lizhanhui commented on code in PR #8915:
URL: https://github.com/apache/rocketmq/pull/8915#discussion_r1842045934
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common/src/main/java/org/apache/rocketmq/common/config/AbstractRocksDBStorage.java:
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@@ -121,14 +121,16 @@ protected void initWriteOptions() {
this.writeOptions = new WriteOptions();
this.writeOptions.setSync(false);
this.writeOptions.setDisableWAL(true);
- this.writeOptions.setNoSlowdown(true);
+ // https://github.com/facebook/rocksdb/wiki/Write-Stalls
+ this.writeOptions.setNoSlowdown(false);
}
protected void initAbleWalWriteOptions() {
this.ableWalWriteOptions = new WriteOptions();
this.ableWalWriteOptions.setSync(false);
this.ableWalWriteOptions.setDisableWAL(false);
- this.ableWalWriteOptions.setNoSlowdown(true);
+ // https://github.com/facebook/rocksdb/wiki/Write-Stalls
+ this.ableWalWriteOptions.setNoSlowdown(false);
Review Comment:
Checkout the RocksGroupCommitService, the group-commit thread is
responsible for triggering and await batch-write to RocksDB; If the
group-commit buffer[bounded, 100k, by default] is full, back-pressure the main
dispatch thread, hence the dispatch-lag metrics alarms.
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