http://git-wip-us.apache.org/repos/asf/hbase-site/blob/35decbe4/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ChunkCreator.MemStoreChunkPool.html
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diff --git
a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ChunkCreator.MemStoreChunkPool.html
b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ChunkCreator.MemStoreChunkPool.html
index faa5693..157ecf3 100644
---
a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ChunkCreator.MemStoreChunkPool.html
+++
b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/ChunkCreator.MemStoreChunkPool.html
@@ -118,338 +118,375 @@
<span class="sourceLineNo">110</span> * @return the chunk that was
initialized<a name="line.110"></a>
<span class="sourceLineNo">111</span> */<a name="line.111"></a>
<span class="sourceLineNo">112</span> Chunk getChunk() {<a
name="line.112"></a>
-<span class="sourceLineNo">113</span> return
getChunk(CompactingMemStore.IndexType.ARRAY_MAP);<a name="line.113"></a>
+<span class="sourceLineNo">113</span> return
getChunk(CompactingMemStore.IndexType.ARRAY_MAP, chunkSize);<a
name="line.113"></a>
<span class="sourceLineNo">114</span> }<a name="line.114"></a>
<span class="sourceLineNo">115</span><a name="line.115"></a>
<span class="sourceLineNo">116</span> /**<a name="line.116"></a>
-<span class="sourceLineNo">117</span> * Creates and inits a chunk.<a
name="line.117"></a>
+<span class="sourceLineNo">117</span> * Creates and inits a chunk. The
default implementation for specific index type.<a name="line.117"></a>
<span class="sourceLineNo">118</span> * @return the chunk that was
initialized<a name="line.118"></a>
-<span class="sourceLineNo">119</span> * @param chunkIndexType whether the
requested chunk is going to be used with CellChunkMap index<a
name="line.119"></a>
-<span class="sourceLineNo">120</span> */<a name="line.120"></a>
-<span class="sourceLineNo">121</span> Chunk
getChunk(CompactingMemStore.IndexType chunkIndexType) {<a name="line.121"></a>
-<span class="sourceLineNo">122</span> Chunk chunk = null;<a
name="line.122"></a>
-<span class="sourceLineNo">123</span> if (pool != null) {<a
name="line.123"></a>
-<span class="sourceLineNo">124</span> // the pool creates the chunk
internally. The chunk#init() call happens here<a name="line.124"></a>
-<span class="sourceLineNo">125</span> chunk = this.pool.getChunk();<a
name="line.125"></a>
-<span class="sourceLineNo">126</span> // the pool has run out of
maxCount<a name="line.126"></a>
-<span class="sourceLineNo">127</span> if (chunk == null) {<a
name="line.127"></a>
-<span class="sourceLineNo">128</span> if (LOG.isTraceEnabled()) {<a
name="line.128"></a>
-<span class="sourceLineNo">129</span> LOG.trace("The chunk pool is
full. Reached maxCount= " + this.pool.getMaxCount()<a name="line.129"></a>
-<span class="sourceLineNo">130</span> + ". Creating chunk
onheap.");<a name="line.130"></a>
-<span class="sourceLineNo">131</span> }<a name="line.131"></a>
-<span class="sourceLineNo">132</span> }<a name="line.132"></a>
-<span class="sourceLineNo">133</span> }<a name="line.133"></a>
-<span class="sourceLineNo">134</span> if (chunk == null) {<a
name="line.134"></a>
-<span class="sourceLineNo">135</span> // the second boolean parameter
means:<a name="line.135"></a>
-<span class="sourceLineNo">136</span> // if CellChunkMap index is
requested, put allocated on demand chunk mapping into chunkIdMap<a
name="line.136"></a>
-<span class="sourceLineNo">137</span> chunk = createChunk(false,
chunkIndexType);<a name="line.137"></a>
-<span class="sourceLineNo">138</span> }<a name="line.138"></a>
-<span class="sourceLineNo">139</span><a name="line.139"></a>
-<span class="sourceLineNo">140</span> // now we need to actually do the
expensive memory allocation step in case of a new chunk,<a name="line.140"></a>
-<span class="sourceLineNo">141</span> // else only the offset is set to the
beginning of the chunk to accept allocations<a name="line.141"></a>
-<span class="sourceLineNo">142</span> chunk.init();<a name="line.142"></a>
-<span class="sourceLineNo">143</span> return chunk;<a name="line.143"></a>
-<span class="sourceLineNo">144</span> }<a name="line.144"></a>
-<span class="sourceLineNo">145</span><a name="line.145"></a>
-<span class="sourceLineNo">146</span> /**<a name="line.146"></a>
-<span class="sourceLineNo">147</span> * Creates the chunk either onheap or
offheap<a name="line.147"></a>
-<span class="sourceLineNo">148</span> * @param pool indicates if the chunks
have to be created which will be used by the Pool<a name="line.148"></a>
-<span class="sourceLineNo">149</span> * @param chunkIndexType<a
name="line.149"></a>
-<span class="sourceLineNo">150</span> * @return the chunk<a
name="line.150"></a>
-<span class="sourceLineNo">151</span> */<a name="line.151"></a>
-<span class="sourceLineNo">152</span> private Chunk createChunk(boolean pool,
CompactingMemStore.IndexType chunkIndexType) {<a name="line.152"></a>
-<span class="sourceLineNo">153</span> Chunk chunk = null;<a
name="line.153"></a>
-<span class="sourceLineNo">154</span> int id = chunkID.getAndIncrement();<a
name="line.154"></a>
-<span class="sourceLineNo">155</span> assert id > 0;<a
name="line.155"></a>
-<span class="sourceLineNo">156</span> // do not create offheap chunk on
demand<a name="line.156"></a>
-<span class="sourceLineNo">157</span> if (pool && this.offheap) {<a
name="line.157"></a>
-<span class="sourceLineNo">158</span> chunk = new OffheapChunk(chunkSize,
id, pool);<a name="line.158"></a>
-<span class="sourceLineNo">159</span> } else {<a name="line.159"></a>
-<span class="sourceLineNo">160</span> chunk = new OnheapChunk(chunkSize,
id, pool);<a name="line.160"></a>
-<span class="sourceLineNo">161</span> }<a name="line.161"></a>
-<span class="sourceLineNo">162</span> if (pool || (chunkIndexType ==
CompactingMemStore.IndexType.CHUNK_MAP)) {<a name="line.162"></a>
-<span class="sourceLineNo">163</span> // put the pool chunk into the
chunkIdMap so it is not GC-ed<a name="line.163"></a>
-<span class="sourceLineNo">164</span> this.chunkIdMap.put(chunk.getId(),
chunk);<a name="line.164"></a>
-<span class="sourceLineNo">165</span> }<a name="line.165"></a>
-<span class="sourceLineNo">166</span> return chunk;<a name="line.166"></a>
-<span class="sourceLineNo">167</span> }<a name="line.167"></a>
-<span class="sourceLineNo">168</span><a name="line.168"></a>
-<span class="sourceLineNo">169</span> @VisibleForTesting<a
name="line.169"></a>
-<span class="sourceLineNo">170</span> // Used to translate the ChunkID into a
chunk ref<a name="line.170"></a>
-<span class="sourceLineNo">171</span> Chunk getChunk(int id) {<a
name="line.171"></a>
-<span class="sourceLineNo">172</span> // can return null if chunk was never
mapped<a name="line.172"></a>
-<span class="sourceLineNo">173</span> return chunkIdMap.get(id);<a
name="line.173"></a>
-<span class="sourceLineNo">174</span> }<a name="line.174"></a>
-<span class="sourceLineNo">175</span><a name="line.175"></a>
-<span class="sourceLineNo">176</span> int getChunkSize() {<a
name="line.176"></a>
-<span class="sourceLineNo">177</span> return this.chunkSize;<a
name="line.177"></a>
-<span class="sourceLineNo">178</span> }<a name="line.178"></a>
-<span class="sourceLineNo">179</span><a name="line.179"></a>
-<span class="sourceLineNo">180</span> boolean isOffheap() {<a
name="line.180"></a>
-<span class="sourceLineNo">181</span> return this.offheap;<a
name="line.181"></a>
-<span class="sourceLineNo">182</span> }<a name="line.182"></a>
-<span class="sourceLineNo">183</span><a name="line.183"></a>
-<span class="sourceLineNo">184</span> private void
removeChunks(Set<Integer> chunkIDs) {<a name="line.184"></a>
-<span class="sourceLineNo">185</span>
this.chunkIdMap.keySet().removeAll(chunkIDs);<a name="line.185"></a>
-<span class="sourceLineNo">186</span> }<a name="line.186"></a>
-<span class="sourceLineNo">187</span><a name="line.187"></a>
-<span class="sourceLineNo">188</span> Chunk removeChunk(int chunkId) {<a
name="line.188"></a>
-<span class="sourceLineNo">189</span> return
this.chunkIdMap.remove(chunkId);<a name="line.189"></a>
-<span class="sourceLineNo">190</span> }<a name="line.190"></a>
-<span class="sourceLineNo">191</span><a name="line.191"></a>
-<span class="sourceLineNo">192</span> @VisibleForTesting<a
name="line.192"></a>
-<span class="sourceLineNo">193</span> // the chunks in the chunkIdMap may
already be released so we shouldn't relay<a name="line.193"></a>
-<span class="sourceLineNo">194</span> // on this counting for strong
correctness. This method is used only in testing.<a name="line.194"></a>
-<span class="sourceLineNo">195</span> int numberOfMappedChunks() {<a
name="line.195"></a>
-<span class="sourceLineNo">196</span> return this.chunkIdMap.size();<a
name="line.196"></a>
-<span class="sourceLineNo">197</span> }<a name="line.197"></a>
-<span class="sourceLineNo">198</span><a name="line.198"></a>
-<span class="sourceLineNo">199</span> @VisibleForTesting<a
name="line.199"></a>
-<span class="sourceLineNo">200</span> void clearChunkIds() {<a
name="line.200"></a>
-<span class="sourceLineNo">201</span> this.chunkIdMap.clear();<a
name="line.201"></a>
-<span class="sourceLineNo">202</span> }<a name="line.202"></a>
-<span class="sourceLineNo">203</span><a name="line.203"></a>
-<span class="sourceLineNo">204</span> /**<a name="line.204"></a>
-<span class="sourceLineNo">205</span> * A pool of {@link Chunk} instances.<a
name="line.205"></a>
-<span class="sourceLineNo">206</span> *<a name="line.206"></a>
-<span class="sourceLineNo">207</span> * MemStoreChunkPool caches a number of
retired chunks for reusing, it could<a name="line.207"></a>
-<span class="sourceLineNo">208</span> * decrease allocating bytes when
writing, thereby optimizing the garbage<a name="line.208"></a>
-<span class="sourceLineNo">209</span> * collection on JVM.<a
name="line.209"></a>
-<span class="sourceLineNo">210</span> */<a name="line.210"></a>
-<span class="sourceLineNo">211</span> private class MemStoreChunkPool
implements HeapMemoryTuneObserver {<a name="line.211"></a>
-<span class="sourceLineNo">212</span> private int maxCount;<a
name="line.212"></a>
-<span class="sourceLineNo">213</span><a name="line.213"></a>
-<span class="sourceLineNo">214</span> // A queue of reclaimed chunks<a
name="line.214"></a>
-<span class="sourceLineNo">215</span> private final
BlockingQueue<Chunk> reclaimedChunks;<a name="line.215"></a>
-<span class="sourceLineNo">216</span> private final float
poolSizePercentage;<a name="line.216"></a>
-<span class="sourceLineNo">217</span><a name="line.217"></a>
-<span class="sourceLineNo">218</span> /** Statistics thread schedule pool
*/<a name="line.218"></a>
-<span class="sourceLineNo">219</span> private final
ScheduledExecutorService scheduleThreadPool;<a name="line.219"></a>
-<span class="sourceLineNo">220</span> /** Statistics thread */<a
name="line.220"></a>
-<span class="sourceLineNo">221</span> private static final int
statThreadPeriod = 60 * 5;<a name="line.221"></a>
-<span class="sourceLineNo">222</span> private final AtomicLong chunkCount =
new AtomicLong();<a name="line.222"></a>
-<span class="sourceLineNo">223</span> private final LongAdder
reusedChunkCount = new LongAdder();<a name="line.223"></a>
+<span class="sourceLineNo">119</span> */<a name="line.119"></a>
+<span class="sourceLineNo">120</span> Chunk
getChunk(CompactingMemStore.IndexType chunkIndexType) {<a name="line.120"></a>
+<span class="sourceLineNo">121</span> return getChunk(chunkIndexType,
chunkSize);<a name="line.121"></a>
+<span class="sourceLineNo">122</span> }<a name="line.122"></a>
+<span class="sourceLineNo">123</span><a name="line.123"></a>
+<span class="sourceLineNo">124</span> /**<a name="line.124"></a>
+<span class="sourceLineNo">125</span> * Creates and inits a chunk.<a
name="line.125"></a>
+<span class="sourceLineNo">126</span> * @return the chunk that was
initialized<a name="line.126"></a>
+<span class="sourceLineNo">127</span> * @param chunkIndexType whether the
requested chunk is going to be used with CellChunkMap index<a
name="line.127"></a>
+<span class="sourceLineNo">128</span> * @param size the size of the chunk to
be allocated, in bytes<a name="line.128"></a>
+<span class="sourceLineNo">129</span> */<a name="line.129"></a>
+<span class="sourceLineNo">130</span> Chunk
getChunk(CompactingMemStore.IndexType chunkIndexType, int size) {<a
name="line.130"></a>
+<span class="sourceLineNo">131</span> Chunk chunk = null;<a
name="line.131"></a>
+<span class="sourceLineNo">132</span> // if we have pool and this is not
jumbo chunk (when size != chunkSize this is jumbo chunk)<a name="line.132"></a>
+<span class="sourceLineNo">133</span> if ((pool != null) && (size
== chunkSize)) {<a name="line.133"></a>
+<span class="sourceLineNo">134</span> // the pool creates the chunk
internally. The chunk#init() call happens here<a name="line.134"></a>
+<span class="sourceLineNo">135</span> chunk = this.pool.getChunk();<a
name="line.135"></a>
+<span class="sourceLineNo">136</span> // the pool has run out of
maxCount<a name="line.136"></a>
+<span class="sourceLineNo">137</span> if (chunk == null) {<a
name="line.137"></a>
+<span class="sourceLineNo">138</span> if (LOG.isTraceEnabled()) {<a
name="line.138"></a>
+<span class="sourceLineNo">139</span> LOG.trace("The chunk pool is
full. Reached maxCount= " + this.pool.getMaxCount()<a name="line.139"></a>
+<span class="sourceLineNo">140</span> + ". Creating chunk
onheap.");<a name="line.140"></a>
+<span class="sourceLineNo">141</span> }<a name="line.141"></a>
+<span class="sourceLineNo">142</span> }<a name="line.142"></a>
+<span class="sourceLineNo">143</span> }<a name="line.143"></a>
+<span class="sourceLineNo">144</span> if (chunk == null) {<a
name="line.144"></a>
+<span class="sourceLineNo">145</span> // the second parameter explains
whether CellChunkMap index is requested,<a name="line.145"></a>
+<span class="sourceLineNo">146</span> // in that case, put allocated on
demand chunk mapping into chunkIdMap<a name="line.146"></a>
+<span class="sourceLineNo">147</span> chunk = createChunk(false,
chunkIndexType, size);<a name="line.147"></a>
+<span class="sourceLineNo">148</span> }<a name="line.148"></a>
+<span class="sourceLineNo">149</span><a name="line.149"></a>
+<span class="sourceLineNo">150</span> // now we need to actually do the
expensive memory allocation step in case of a new chunk,<a name="line.150"></a>
+<span class="sourceLineNo">151</span> // else only the offset is set to the
beginning of the chunk to accept allocations<a name="line.151"></a>
+<span class="sourceLineNo">152</span> chunk.init();<a name="line.152"></a>
+<span class="sourceLineNo">153</span> return chunk;<a name="line.153"></a>
+<span class="sourceLineNo">154</span> }<a name="line.154"></a>
+<span class="sourceLineNo">155</span><a name="line.155"></a>
+<span class="sourceLineNo">156</span> /**<a name="line.156"></a>
+<span class="sourceLineNo">157</span> * Creates and inits a chunk of a
special size, bigger than a regular chunk size.<a name="line.157"></a>
+<span class="sourceLineNo">158</span> * Such a chunk will never come from
pool and will always be on demand allocated.<a name="line.158"></a>
+<span class="sourceLineNo">159</span> * @return the chunk that was
initialized<a name="line.159"></a>
+<span class="sourceLineNo">160</span> * @param chunkIndexType whether the
requested chunk is going to be used with CellChunkMap index<a
name="line.160"></a>
+<span class="sourceLineNo">161</span> * @param jumboSize the special size to
be used<a name="line.161"></a>
+<span class="sourceLineNo">162</span> */<a name="line.162"></a>
+<span class="sourceLineNo">163</span> Chunk
getJumboChunk(CompactingMemStore.IndexType chunkIndexType, int jumboSize) {<a
name="line.163"></a>
+<span class="sourceLineNo">164</span> if (jumboSize <= chunkSize) {<a
name="line.164"></a>
+<span class="sourceLineNo">165</span> LOG.warn("Jumbo chunk size " +
jumboSize + " must be more than regular chunk size "<a name="line.165"></a>
+<span class="sourceLineNo">166</span> + chunkSize + ". Converting to
regular chunk.");<a name="line.166"></a>
+<span class="sourceLineNo">167</span>
getChunk(chunkIndexType,chunkSize);<a name="line.167"></a>
+<span class="sourceLineNo">168</span> }<a name="line.168"></a>
+<span class="sourceLineNo">169</span> return getChunk(chunkIndexType,
jumboSize);<a name="line.169"></a>
+<span class="sourceLineNo">170</span> }<a name="line.170"></a>
+<span class="sourceLineNo">171</span><a name="line.171"></a>
+<span class="sourceLineNo">172</span> /**<a name="line.172"></a>
+<span class="sourceLineNo">173</span> * Creates the chunk either onheap or
offheap<a name="line.173"></a>
+<span class="sourceLineNo">174</span> * @param pool indicates if the chunks
have to be created which will be used by the Pool<a name="line.174"></a>
+<span class="sourceLineNo">175</span> * @param chunkIndexType whether the
requested chunk is going to be used with CellChunkMap index<a
name="line.175"></a>
+<span class="sourceLineNo">176</span> * @param size the size of the chunk to
be allocated, in bytes<a name="line.176"></a>
+<span class="sourceLineNo">177</span> * @return the chunk<a
name="line.177"></a>
+<span class="sourceLineNo">178</span> */<a name="line.178"></a>
+<span class="sourceLineNo">179</span> private Chunk createChunk(boolean pool,
CompactingMemStore.IndexType chunkIndexType, int size) {<a name="line.179"></a>
+<span class="sourceLineNo">180</span> Chunk chunk = null;<a
name="line.180"></a>
+<span class="sourceLineNo">181</span> int id = chunkID.getAndIncrement();<a
name="line.181"></a>
+<span class="sourceLineNo">182</span> assert id > 0;<a
name="line.182"></a>
+<span class="sourceLineNo">183</span> // do not create offheap chunk on
demand<a name="line.183"></a>
+<span class="sourceLineNo">184</span> if (pool && this.offheap) {<a
name="line.184"></a>
+<span class="sourceLineNo">185</span> chunk = new OffheapChunk(size, id,
pool);<a name="line.185"></a>
+<span class="sourceLineNo">186</span> } else {<a name="line.186"></a>
+<span class="sourceLineNo">187</span> chunk = new OnheapChunk(size, id,
pool);<a name="line.187"></a>
+<span class="sourceLineNo">188</span> }<a name="line.188"></a>
+<span class="sourceLineNo">189</span> if (pool || (chunkIndexType ==
CompactingMemStore.IndexType.CHUNK_MAP)) {<a name="line.189"></a>
+<span class="sourceLineNo">190</span> // put the pool chunk into the
chunkIdMap so it is not GC-ed<a name="line.190"></a>
+<span class="sourceLineNo">191</span> this.chunkIdMap.put(chunk.getId(),
chunk);<a name="line.191"></a>
+<span class="sourceLineNo">192</span> }<a name="line.192"></a>
+<span class="sourceLineNo">193</span> return chunk;<a name="line.193"></a>
+<span class="sourceLineNo">194</span> }<a name="line.194"></a>
+<span class="sourceLineNo">195</span><a name="line.195"></a>
+<span class="sourceLineNo">196</span> // Chunks from pool are created covered
with strong references anyway<a name="line.196"></a>
+<span class="sourceLineNo">197</span> // TODO: change to CHUNK_MAP if it is
generally defined<a name="line.197"></a>
+<span class="sourceLineNo">198</span> private Chunk createChunkForPool() {<a
name="line.198"></a>
+<span class="sourceLineNo">199</span> return createChunk(true,
CompactingMemStore.IndexType.ARRAY_MAP, chunkSize);<a name="line.199"></a>
+<span class="sourceLineNo">200</span> }<a name="line.200"></a>
+<span class="sourceLineNo">201</span><a name="line.201"></a>
+<span class="sourceLineNo">202</span> @VisibleForTesting<a
name="line.202"></a>
+<span class="sourceLineNo">203</span> // Used to translate the ChunkID into a
chunk ref<a name="line.203"></a>
+<span class="sourceLineNo">204</span> Chunk getChunk(int id) {<a
name="line.204"></a>
+<span class="sourceLineNo">205</span> // can return null if chunk was never
mapped<a name="line.205"></a>
+<span class="sourceLineNo">206</span> return chunkIdMap.get(id);<a
name="line.206"></a>
+<span class="sourceLineNo">207</span> }<a name="line.207"></a>
+<span class="sourceLineNo">208</span><a name="line.208"></a>
+<span class="sourceLineNo">209</span> int getChunkSize() {<a
name="line.209"></a>
+<span class="sourceLineNo">210</span> return this.chunkSize;<a
name="line.210"></a>
+<span class="sourceLineNo">211</span> }<a name="line.211"></a>
+<span class="sourceLineNo">212</span><a name="line.212"></a>
+<span class="sourceLineNo">213</span> boolean isOffheap() {<a
name="line.213"></a>
+<span class="sourceLineNo">214</span> return this.offheap;<a
name="line.214"></a>
+<span class="sourceLineNo">215</span> }<a name="line.215"></a>
+<span class="sourceLineNo">216</span><a name="line.216"></a>
+<span class="sourceLineNo">217</span> private void
removeChunks(Set<Integer> chunkIDs) {<a name="line.217"></a>
+<span class="sourceLineNo">218</span>
this.chunkIdMap.keySet().removeAll(chunkIDs);<a name="line.218"></a>
+<span class="sourceLineNo">219</span> }<a name="line.219"></a>
+<span class="sourceLineNo">220</span><a name="line.220"></a>
+<span class="sourceLineNo">221</span> Chunk removeChunk(int chunkId) {<a
name="line.221"></a>
+<span class="sourceLineNo">222</span> return
this.chunkIdMap.remove(chunkId);<a name="line.222"></a>
+<span class="sourceLineNo">223</span> }<a name="line.223"></a>
<span class="sourceLineNo">224</span><a name="line.224"></a>
-<span class="sourceLineNo">225</span> MemStoreChunkPool(int maxCount, int
initialCount, float poolSizePercentage) {<a name="line.225"></a>
-<span class="sourceLineNo">226</span> this.maxCount = maxCount;<a
name="line.226"></a>
-<span class="sourceLineNo">227</span> this.poolSizePercentage =
poolSizePercentage;<a name="line.227"></a>
-<span class="sourceLineNo">228</span> this.reclaimedChunks = new
LinkedBlockingQueue<>();<a name="line.228"></a>
-<span class="sourceLineNo">229</span> for (int i = 0; i <
initialCount; i++) {<a name="line.229"></a>
-<span class="sourceLineNo">230</span> // Chunks from pool are covered
with strong references anyway<a name="line.230"></a>
-<span class="sourceLineNo">231</span> // TODO: change to CHUNK_MAP if
it is generally defined<a name="line.231"></a>
-<span class="sourceLineNo">232</span> Chunk chunk = createChunk(true,
CompactingMemStore.IndexType.ARRAY_MAP);<a name="line.232"></a>
-<span class="sourceLineNo">233</span> chunk.init();<a
name="line.233"></a>
-<span class="sourceLineNo">234</span> reclaimedChunks.add(chunk);<a
name="line.234"></a>
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name="line.236"></a>
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Thread.currentThread().getName();<a name="line.237"></a>
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Executors.newScheduledThreadPool(1, new ThreadFactoryBuilder()<a
name="line.238"></a>
-<span class="sourceLineNo">239</span> .setNameFormat(n +
"-MemStoreChunkPool Statistics").setDaemon(true).build());<a
name="line.239"></a>
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this.scheduleThreadPool.scheduleAtFixedRate(new StatisticsThread(),
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it if not null, else create a new chunk to return if we have<a
name="line.245"></a>
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count. When we have already created max allowed chunks and<a
name="line.246"></a>
-<span class="sourceLineNo">247</span> * no free chunks as of now, return
null. It is the responsibility of the caller to make a chunk<a
name="line.247"></a>
-<span class="sourceLineNo">248</span> * then.<a name="line.248"></a>
-<span class="sourceLineNo">249</span> * Note: Chunks returned by this pool
must be put back to the pool after its use.<a name="line.249"></a>
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name="line.250"></a>
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name="line.251"></a>
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name="line.253"></a>
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reclaimedChunks.poll();<a name="line.254"></a>
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name="line.255"></a>
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name="line.256"></a>
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name="line.257"></a>
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(this.chunkCount.compareAndSet(created, created + 1)) {<a name="line.263"></a>
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CHUNK_MAP if it is generally defined<a name="line.264"></a>
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name="line.266"></a>
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-<span class="sourceLineNo">272</span> }<a name="line.272"></a>
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-<span class="sourceLineNo">275</span><a name="line.275"></a>
-<span class="sourceLineNo">276</span> /**<a name="line.276"></a>
-<span class="sourceLineNo">277</span> * Add the chunks to the pool, when
the pool achieves the max size, it will skip the remaining<a
name="line.277"></a>
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{<a name="line.281"></a>
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reclaimedChunks.size();<a name="line.282"></a>
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> 0) {<a name="line.283"></a>
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name="line.284"></a>
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going to pool)<a name="line.286"></a>
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ChunkCreator.this.removeChunk(c.getId());<a name="line.288"></a>
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extends Thread {<a name="line.292"></a>
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name="line.293"></a>
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super("MemStoreChunkPool.StatisticsThread");<a name="line.294"></a>
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name="line.295"></a>
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return;<a name="line.304"></a>
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chunkCount.get();<a name="line.305"></a>
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reusedChunkCount.sum();<a name="line.306"></a>
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name="line.307"></a>
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size=" + reclaimedChunks.size()<a name="line.308"></a>
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created<a name="line.309"></a>
-<span class="sourceLineNo">310</span> + ",reused chunk count=" +
reused<a name="line.310"></a>
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0 ? "0" : StringUtils.formatPercent(<a name="line.311"></a>
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total, 2)));<a name="line.312"></a>
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name="line.323"></a>
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pool as it is offheap");<a name="line.324"></a>
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+<span class="sourceLineNo">225</span> @VisibleForTesting<a
name="line.225"></a>
+<span class="sourceLineNo">226</span> // the chunks in the chunkIdMap may
already be released so we shouldn't relay<a name="line.226"></a>
+<span class="sourceLineNo">227</span> // on this counting for strong
correctness. This method is used only in testing.<a name="line.227"></a>
+<span class="sourceLineNo">228</span> int numberOfMappedChunks() {<a
name="line.228"></a>
+<span class="sourceLineNo">229</span> return this.chunkIdMap.size();<a
name="line.229"></a>
+<span class="sourceLineNo">230</span> }<a name="line.230"></a>
+<span class="sourceLineNo">231</span><a name="line.231"></a>
+<span class="sourceLineNo">232</span> @VisibleForTesting<a
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name="line.233"></a>
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name="line.234"></a>
+<span class="sourceLineNo">235</span> }<a name="line.235"></a>
+<span class="sourceLineNo">236</span><a name="line.236"></a>
+<span class="sourceLineNo">237</span> /**<a name="line.237"></a>
+<span class="sourceLineNo">238</span> * A pool of {@link Chunk} instances.<a
name="line.238"></a>
+<span class="sourceLineNo">239</span> *<a name="line.239"></a>
+<span class="sourceLineNo">240</span> * MemStoreChunkPool caches a number of
retired chunks for reusing, it could<a name="line.240"></a>
+<span class="sourceLineNo">241</span> * decrease allocating bytes when
writing, thereby optimizing the garbage<a name="line.241"></a>
+<span class="sourceLineNo">242</span> * collection on JVM.<a
name="line.242"></a>
+<span class="sourceLineNo">243</span> */<a name="line.243"></a>
+<span class="sourceLineNo">244</span> private class MemStoreChunkPool
implements HeapMemoryTuneObserver {<a name="line.244"></a>
+<span class="sourceLineNo">245</span> private int maxCount;<a
name="line.245"></a>
+<span class="sourceLineNo">246</span><a name="line.246"></a>
+<span class="sourceLineNo">247</span> // A queue of reclaimed chunks<a
name="line.247"></a>
+<span class="sourceLineNo">248</span> private final
BlockingQueue<Chunk> reclaimedChunks;<a name="line.248"></a>
+<span class="sourceLineNo">249</span> private final float
poolSizePercentage;<a name="line.249"></a>
+<span class="sourceLineNo">250</span><a name="line.250"></a>
+<span class="sourceLineNo">251</span> /** Statistics thread schedule pool
*/<a name="line.251"></a>
+<span class="sourceLineNo">252</span> private final
ScheduledExecutorService scheduleThreadPool;<a name="line.252"></a>
+<span class="sourceLineNo">253</span> /** Statistics thread */<a
name="line.253"></a>
+<span class="sourceLineNo">254</span> private static final int
statThreadPeriod = 60 * 5;<a name="line.254"></a>
+<span class="sourceLineNo">255</span> private final AtomicLong chunkCount =
new AtomicLong();<a name="line.255"></a>
+<span class="sourceLineNo">256</span> private final LongAdder
reusedChunkCount = new LongAdder();<a name="line.256"></a>
+<span class="sourceLineNo">257</span><a name="line.257"></a>
+<span class="sourceLineNo">258</span> MemStoreChunkPool(int maxCount, int
initialCount, float poolSizePercentage) {<a name="line.258"></a>
+<span class="sourceLineNo">259</span> this.maxCount = maxCount;<a
name="line.259"></a>
+<span class="sourceLineNo">260</span> this.poolSizePercentage =
poolSizePercentage;<a name="line.260"></a>
+<span class="sourceLineNo">261</span> this.reclaimedChunks = new
LinkedBlockingQueue<>();<a name="line.261"></a>
+<span class="sourceLineNo">262</span> for (int i = 0; i <
initialCount; i++) {<a name="line.262"></a>
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createChunkForPool();<a name="line.263"></a>
+<span class="sourceLineNo">264</span> chunk.init();<a
name="line.264"></a>
+<span class="sourceLineNo">265</span> reclaimedChunks.add(chunk);<a
name="line.265"></a>
+<span class="sourceLineNo">266</span> }<a name="line.266"></a>
+<span class="sourceLineNo">267</span> chunkCount.set(initialCount);<a
name="line.267"></a>
+<span class="sourceLineNo">268</span> final String n =
Thread.currentThread().getName();<a name="line.268"></a>
+<span class="sourceLineNo">269</span> scheduleThreadPool =
Executors.newScheduledThreadPool(1, new ThreadFactoryBuilder()<a
name="line.269"></a>
+<span class="sourceLineNo">270</span> .setNameFormat(n +
"-MemStoreChunkPool Statistics").setDaemon(true).build());<a
name="line.270"></a>
+<span class="sourceLineNo">271</span>
this.scheduleThreadPool.scheduleAtFixedRate(new StatisticsThread(),
statThreadPeriod,<a name="line.271"></a>
+<span class="sourceLineNo">272</span> statThreadPeriod,
TimeUnit.SECONDS);<a name="line.272"></a>
+<span class="sourceLineNo">273</span> }<a name="line.273"></a>
+<span class="sourceLineNo">274</span><a name="line.274"></a>
+<span class="sourceLineNo">275</span> /**<a name="line.275"></a>
+<span class="sourceLineNo">276</span> * Poll a chunk from the pool, reset
it if not null, else create a new chunk to return if we have<a
name="line.276"></a>
+<span class="sourceLineNo">277</span> * not yet created max allowed chunks
count. When we have already created max allowed chunks and<a
name="line.277"></a>
+<span class="sourceLineNo">278</span> * no free chunks as of now, return
null. It is the responsibility of the caller to make a chunk<a
name="line.278"></a>
+<span class="sourceLineNo">279</span> * then.<a name="line.279"></a>
+<span class="sourceLineNo">280</span> * Note: Chunks returned by this pool
must be put back to the pool after its use.<a name="line.280"></a>
+<span class="sourceLineNo">281</span> * @return a chunk<a
name="line.281"></a>
+<span class="sourceLineNo">282</span> * @see #putbackChunks(Chunk)<a
name="line.282"></a>
+<span class="sourceLineNo">283</span> */<a name="line.283"></a>
+<span class="sourceLineNo">284</span> Chunk getChunk() {<a
name="line.284"></a>
+<span class="sourceLineNo">285</span> Chunk chunk =
reclaimedChunks.poll();<a name="line.285"></a>
+<span class="sourceLineNo">286</span> if (chunk != null) {<a
name="line.286"></a>
+<span class="sourceLineNo">287</span> chunk.reset();<a
name="line.287"></a>
+<span class="sourceLineNo">288</span> reusedChunkCount.increment();<a
name="line.288"></a>
+<span class="sourceLineNo">289</span> } else {<a name="line.289"></a>
+<span class="sourceLineNo">290</span> // Make a chunk iff we have not
yet created the maxCount chunks<a name="line.290"></a>
+<span class="sourceLineNo">291</span> while (true) {<a
name="line.291"></a>
+<span class="sourceLineNo">292</span> long created =
this.chunkCount.get();<a name="line.292"></a>
+<span class="sourceLineNo">293</span> if (created < this.maxCount)
{<a name="line.293"></a>
+<span class="sourceLineNo">294</span> if
(this.chunkCount.compareAndSet(created, created + 1)) {<a name="line.294"></a>
+<span class="sourceLineNo">295</span> chunk =
createChunkForPool();<a name="line.295"></a>
+<span class="sourceLineNo">296</span> break;<a
name="line.296"></a>
+<span class="sourceLineNo">297</span> }<a name="line.297"></a>
+<span class="sourceLineNo">298</span> } else {<a name="line.298"></a>
+<span class="sourceLineNo">299</span> break;<a name="line.299"></a>
+<span class="sourceLineNo">300</span> }<a name="line.300"></a>
+<span class="sourceLineNo">301</span> }<a name="line.301"></a>
+<span class="sourceLineNo">302</span> }<a name="line.302"></a>
+<span class="sourceLineNo">303</span> return chunk;<a name="line.303"></a>
+<span class="sourceLineNo">304</span> }<a name="line.304"></a>
+<span class="sourceLineNo">305</span><a name="line.305"></a>
+<span class="sourceLineNo">306</span> /**<a name="line.306"></a>
+<span class="sourceLineNo">307</span> * Add the chunks to the pool, when
the pool achieves the max size, it will skip the remaining<a
name="line.307"></a>
+<span class="sourceLineNo">308</span> * chunks<a name="line.308"></a>
+<span class="sourceLineNo">309</span> * @param c<a name="line.309"></a>
+<span class="sourceLineNo">310</span> */<a name="line.310"></a>
+<span class="sourceLineNo">311</span> private void putbackChunks(Chunk c)
{<a name="line.311"></a>
+<span class="sourceLineNo">312</span> int toAdd = this.maxCount -
reclaimedChunks.size();<a name="line.312"></a>
+<span class="sourceLineNo">313</span> if (c.isFromPool() && toAdd
> 0) {<a name="line.313"></a>
+<span class="sourceLineNo">314</span> reclaimedChunks.add(c);<a
name="line.314"></a>
+<span class="sourceLineNo">315</span> } else {<a name="line.315"></a>
+<span class="sourceLineNo">316</span> // remove the chunk (that is not
going to pool)<a name="line.316"></a>
+<span class="sourceLineNo">317</span> // though it is initially from
the pool or not<a name="line.317"></a>
+<span class="sourceLineNo">318</span>
ChunkCreator.this.removeChunk(c.getId());<a name="line.318"></a>
+<span class="sourceLineNo">319</span> }<a name="line.319"></a>
+<span class="sourceLineNo">320</span> }<a name="line.320"></a>
+<span class="sourceLineNo">321</span><a name="line.321"></a>
+<span class="sourceLineNo">322</span> private class StatisticsThread
extends Thread {<a name="line.322"></a>
+<span class="sourceLineNo">323</span> StatisticsThread() {<a
name="line.323"></a>
+<span class="sourceLineNo">324</span>
super("MemStoreChunkPool.StatisticsThread");<a name="line.324"></a>
+<span class="sourceLineNo">325</span> setDaemon(true);<a
name="line.325"></a>
<span class="sourceLineNo">326</span> }<a name="line.326"></a>
-<span class="sourceLineNo">327</span> int newMaxCount =<a
name="line.327"></a>
-<span class="sourceLineNo">328</span> (int) (newMemstoreSize *
poolSizePercentage / getChunkSize());<a name="line.328"></a>
-<span class="sourceLineNo">329</span> if (newMaxCount != this.maxCount)
{<a name="line.329"></a>
-<span class="sourceLineNo">330</span> // We need an adjustment in the
chunks numbers<a name="line.330"></a>
-<span class="sourceLineNo">331</span> if (newMaxCount >
this.maxCount) {<a name="line.331"></a>
-<span class="sourceLineNo">332</span> // Max chunks getting
increased. Just change the variable. Later calls to getChunk() would<a
name="line.332"></a>
-<span class="sourceLineNo">333</span> // create and add them to Q<a
name="line.333"></a>
-<span class="sourceLineNo">334</span> LOG.info("Max count for chunks
increased from " + this.maxCount + " to " + newMaxCount);<a name="line.334"></a>
-<span class="sourceLineNo">335</span> this.maxCount = newMaxCount;<a
name="line.335"></a>
-<span class="sourceLineNo">336</span> } else {<a name="line.336"></a>
-<span class="sourceLineNo">337</span> // Max chunks getting
decreased. We may need to clear off some of the pooled chunks now<a
name="line.337"></a>
-<span class="sourceLineNo">338</span> // itself. If the extra chunks
are serving already, do not pool those when we get them back<a
name="line.338"></a>
-<span class="sourceLineNo">339</span> LOG.info("Max count for chunks
decreased from " + this.maxCount + " to " + newMaxCount);<a name="line.339"></a>
-<span class="sourceLineNo">340</span> this.maxCount = newMaxCount;<a
name="line.340"></a>
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> newMaxCount) {<a name="line.341"></a>
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name="line.342"></a>
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(this.reclaimedChunks.size() > newMaxCount) {<a name="line.343"></a>
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this.reclaimedChunks.poll();<a name="line.344"></a>
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-<span class="sourceLineNo">346</span> }<a name="line.346"></a>
-<span class="sourceLineNo">347</span> }<a name="line.347"></a>
-<span class="sourceLineNo">348</span> }<a name="line.348"></a>
-<span class="sourceLineNo">349</span> }<a name="line.349"></a>
-<span class="sourceLineNo">350</span> }<a name="line.350"></a>
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name="line.353"></a>
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name="line.354"></a>
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name="line.355"></a>
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initializePool(long globalMemStoreSize, float poolSizePercentage,<a
name="line.358"></a>
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name="line.359"></a>
-<span class="sourceLineNo">360</span> if (poolSizePercentage <= 0) {<a
name="line.360"></a>
-<span class="sourceLineNo">361</span> LOG.info("PoolSizePercentage is
less than 0. So not using pool");<a name="line.361"></a>
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name="line.364"></a>
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name="line.367"></a>
-<span class="sourceLineNo">368</span> throw new
IllegalArgumentException(<a name="line.368"></a>
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MemStoreLAB.CHUNK_POOL_MAXSIZE_KEY + " must be between 0.0 and 1.0");<a
name="line.369"></a>
-<span class="sourceLineNo">370</span> }<a name="line.370"></a>
-<span class="sourceLineNo">371</span> int maxCount = (int)
(globalMemStoreSize * poolSizePercentage / getChunkSize());<a
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reusedChunkCount.sum();<a name="line.336"></a>
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created<a name="line.339"></a>
+<span class="sourceLineNo">340</span> + ",reused chunk count=" +
reused<a name="line.340"></a>
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+<span class="sourceLineNo">344</span> }<a name="line.344"></a>
+<span class="sourceLineNo">345</span><a name="line.345"></a>
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name="line.347"></a>
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newMemstoreSize, long newBlockCacheSize) {<a name="line.351"></a>
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offheap memstore<a name="line.352"></a>
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name="line.353"></a>
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pool as it is offheap");<a name="line.354"></a>
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poolSizePercentage / getChunkSize());<a name="line.358"></a>
+<span class="sourceLineNo">359</span> if (newMaxCount != this.maxCount)
{<a name="line.359"></a>
+<span class="sourceLineNo">360</span> // We need an adjustment in the
chunks numbers<a name="line.360"></a>
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this.maxCount) {<a name="line.361"></a>
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increased. Just change the variable. Later calls to getChunk() would<a
name="line.362"></a>
+<span class="sourceLineNo">363</span> // create and add them to Q<a
name="line.363"></a>
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increased from " + this.maxCount + " to " + newMaxCount);<a name="line.364"></a>
+<span class="sourceLineNo">365</span> this.maxCount = newMaxCount;<a
name="line.365"></a>
+<span class="sourceLineNo">366</span> } else {<a name="line.366"></a>
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decreased. We may need to clear off some of the pooled chunks now<a
name="line.367"></a>
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are serving already, do not pool those when we get them back<a
name="line.368"></a>
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decreased from " + this.maxCount + " to " + newMaxCount);<a name="line.369"></a>
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name="line.370"></a>
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> newMaxCount) {<a name="line.371"></a>
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(this.reclaimedChunks.size() > newMaxCount) {<a name="line.373"></a>
+<span class="sourceLineNo">374</span>
this.reclaimedChunks.poll();<a name="line.374"></a>
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+<span class="sourceLineNo">376</span> }<a name="line.376"></a>
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<span class="sourceLineNo">381</span> }<a name="line.381"></a>
<span class="sourceLineNo">382</span><a name="line.382"></a>
<span class="sourceLineNo">383</span> @VisibleForTesting<a
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-<span class="sourceLineNo">410</span> return false;<a name="line.410"></a>
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name="line.385"></a>
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+<span class="sourceLineNo">387</span><a name="line.387"></a>
+<span class="sourceLineNo">388</span> private MemStoreChunkPool
initializePool(long globalMemStoreSize, float poolSizePercentage,<a
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+<span class="sourceLineNo">389</span> float initialCountPercentage) {<a
name="line.389"></a>
+<span class="sourceLineNo">390</span> if (poolSizePercentage <= 0) {<a
name="line.390"></a>
+<span class="sourceLineNo">391</span> LOG.info("PoolSizePercentage is
less than 0. So not using pool");<a name="line.391"></a>
+<span class="sourceLineNo">392</span> return null;<a name="line.392"></a>
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name="line.397"></a>
+<span class="sourceLineNo">398</span> throw new
IllegalArgumentException(<a name="line.398"></a>
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MemStoreLAB.CHUNK_POOL_MAXSIZE_KEY + " must be between 0.0 and 1.0");<a
name="line.399"></a>
+<span class="sourceLineNo">400</span> }<a name="line.400"></a>
+<span class="sourceLineNo">401</span> int maxCount = (int)
(globalMemStoreSize * poolSizePercentage / getChunkSize());<a
name="line.401"></a>
+<span class="sourceLineNo">402</span> if (initialCountPercentage > 1.0
|| initialCountPercentage < 0) {<a name="line.402"></a>
+<span class="sourceLineNo">403</span> throw new
IllegalArgumentException(<a name="line.403"></a>
+<span class="sourceLineNo">404</span>
MemStoreLAB.CHUNK_POOL_INITIALSIZE_KEY + " must be between 0.0 and 1.0");<a
name="line.404"></a>
+<span class="sourceLineNo">405</span> }<a name="line.405"></a>
+<span class="sourceLineNo">406</span> int initialCount = (int)
(initialCountPercentage * maxCount);<a name="line.406"></a>
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+<span class="sourceLineNo">408</span> +
StringUtils.byteDesc(getChunkSize()) + ", max count " + maxCount<a
name="line.408"></a>
+<span class="sourceLineNo">409</span> + ", initial count " +
initialCount);<a name="line.409"></a>
+<span class="sourceLineNo">410</span> return new
MemStoreChunkPool(maxCount, initialCount, poolSizePercentage);<a
name="line.410"></a>
<span class="sourceLineNo">411</span> }<a name="line.411"></a>
<span class="sourceLineNo">412</span><a name="line.412"></a>
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+<span class="sourceLineNo">420</span><a name="line.420"></a>
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pool.reclaimedChunks.contains(c);<a name="line.437"></a>
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+<span class="sourceLineNo">452</span><a name="line.452"></a>
+<span class="sourceLineNo">453</span> synchronized void
putbackChunks(Set<Integer> chunks) {<a name="line.453"></a>
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clear the chunkIdMap in case there is something<a name="line.454"></a>
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name="line.456"></a>
+<span class="sourceLineNo">457</span> return;<a name="line.457"></a>
+<span class="sourceLineNo">458</span> }<a name="line.458"></a>
+<span class="sourceLineNo">459</span><a name="line.459"></a>
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chunk IDs that came back, the chunks may be from pool or not<a
name="line.460"></a>
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chunk initially wasn't in pool<a name="line.462"></a>
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likely) return null<a name="line.463"></a>
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ChunkCreator.this.getChunk(chunkID);<a name="line.464"></a>
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chunkIdMap, but are not from pool, so such a chunk should<a name="line.466"></a>
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to pool.<a name="line.467"></a>
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will cause their removal by the GC.<a name="line.468"></a>
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name="line.469"></a>
+<span class="sourceLineNo">470</span> this.removeChunk(chunkID);<a
name="line.470"></a>
+<span class="sourceLineNo">471</span> } else {<a name="line.471"></a>
+<span class="sourceLineNo">472</span> pool.putbackChunks(chunk);<a
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+<span class="sourceLineNo">480</span><a name="line.480"></a>
+<span class="sourceLineNo">481</span>}<a name="line.481"></a>
