carp84 commented on a change in pull request #10820:
[FLINK-15512][statebackend] Refactor the mechanism to calculate the cache
capacity shared among RocksDB instance(s)
URL: https://github.com/apache/flink/pull/10820#discussion_r365226910
##########
File path:
flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBOperationUtils.java
##########
@@ -213,4 +211,40 @@ public static void addColumnFamilyOptionsToCloseLater(
throw new IOException("Failed to acquire shared cache
resource for RocksDB", e);
}
}
+
+ @VisibleForTesting
+ static RocksDBSharedResources allocateRocksDBSharedResources(long size,
double writeBufferRatio, double highPriorityPoolRatio) {
+ long calculatedCacheSize = calculateActualCacheSize(size,
writeBufferRatio);
+ final Cache cache = createCache(calculatedCacheSize,
highPriorityPoolRatio);
+ final WriteBufferManager wbm = new WriteBufferManager((long)
(writeBufferRatio * size), cache);
Review comment:
The `WriteBufferManager` size should also be calculated with the deduced
formula: `2 * total_memory_size * write_buffer_ratio / 3`
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