carp84 commented on a change in pull request #10329:
[FLINK-12785][StateBackend] RocksDB savepoint recovery can use a lot of
unmanaged memory
URL: https://github.com/apache/flink/pull/10329#discussion_r353878204
##########
File path:
flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBWriteBatchWrapper.java
##########
@@ -113,4 +126,16 @@ public void close() throws RocksDBException {
}
IOUtils.closeQuietly(batch);
}
+
+ private void flushIfNeeded() throws RocksDBException {
+ boolean needFlush = batch.count() == capacity || (batchSize > 0
&& batch.getDataSize() >= batchSize);
+ if (needFlush) {
+ flush();
+ }
+ }
+
+ @VisibleForTesting
+ long getDataSize() {
+ return batch.getDataSize();
Review comment:
A little bit curious about how much the new implementation (additional
calculation on data size) could improve the performance. Mind adding some
comparison between the old (jni call) and new implementation here through micro
benchmark? @klion26 Thanks.
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