Hi ,
I noticed that parameter , But from the patch hbase-8163v6.patch which is changed for file MemStoreLAB.java , NOT file MemStoreChunkPool.java , so I was confused . Index: hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreLAB.java On 3 Jul 2019, at 19:27, Jean-Marc Spaggiari <jean-m...@spaggiari.org<mailto:jean-m...@spaggiari.org>> wrote: I just checked and I can see it in 1.4.10 jmspaggiari@t460s:/stock/hbase-releases/hbase-1.4.10$ grep -R hbase.hregion.memstore.chunkpool.maxsize * hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreChunkPool.java: final static String CHUNK_POOL_MAXSIZE_KEY = "hbase.hregion.memstore.chunkpool.maxsize"; j Le mar. 2 juil. 2019 à 22:31, Vladimir Rodionov <vladrodio...@gmail.com<mailto:vladrodio...@gmail.com>> a écrit : HBase 1.4.10 should have MSLAB already. I presume. I personally have never used 1.3.x and 1.4.x but I think if 1.1.x has this feature (its probably there since 0.96?) 1.3 and 1.4 must have it as well. -Vlad On Mon, Jul 1, 2019 at 10:20 PM Syni Guo <guoshengy...@outlook.com<mailto:guoshengy...@outlook.com>> wrote: Hi , I want to use MSLAB feature on Hbase 1.4.10, I checked the useage HBASE-8163 (https://issues.apache.org/jira/browse/HBASE-8163) as bellow , it was fixed 0.98.0, 0.95.0 and whether need to apply it on Hbase 1.4.10 ? Usage: Disable pool(default): configure "hbase.hregion.memstore.chunkpool.maxsize" as 0 Enable pool: configure "hbase.hregion.memstore.chunkpool.maxsize" as a percentage of global memstore size (between 0.0 and 1.0, recommend to set it as the gap between min and max sizes of memstore, e.g. 0.5) Hbase DOC: If you have a write-heavy workload, check out HBASE-8163 MemStoreChunkPool: An improvement for JAVA GC when using MSLAB< https://issues.apache.org/jira/browse/HBASE-8163>. It describes configurations to lower the amount of young GC during write-heavy loadings. If you do not have HBASE-8163 installed, Question : 1. Need to apply HBASE-8163 on Hbase 1.4.10 ? 2. How to check out HBASE-8163 is installed on Hbase 1.4.10 bin vaersion? Regards, Syni
