Cczzzz edited a comment on issue #3315:
URL: https://github.com/apache/rocketmq/issues/3315#issuecomment-914124366
I add Metrics and recompile。write page cache is quickly。the part of raft
sync is bottleneck。
specifically is ：
long now = this.defaultMessageStore.getSystemClock().now();
return dledgerFuture.thenApply(appendEntryResponse -> {
metrics.putRtRAFT(this.defaultMessageStore.getSystemClock().now() - now);//my
Metrics
PutMessageStatus putMessageStatus =
PutMessageStatus.UNKNOWN_ERROR;
switch
(DLedgerResponseCode.valueOf(appendEntryResponse.getCode())) {
case SUCCESS:
putMessageStatus = PutMessageStatus.PUT_OK;
break;
case INCONSISTENT_LEADER:
case NOT_LEADER:
case LEADER_NOT_READY:
case DISK_FULL:
putMessageStatus =
PutMessageStatus.SERVICE_NOT_AVAILABLE;
break;
case WAIT_QUORUM_ACK_TIMEOUT:
//Do not return flush_slave_timeout to the client, for
the ons client will ignore it.
putMessageStatus = PutMessageStatus.OS_PAGECACHE_BUSY;
break;
case LEADER_PENDING_FULL:
putMessageStatus = PutMessageStatus.OS_PAGECACHE_BUSY;
break;
}
PutMessageResult putMessageResult = new
PutMessageResult(putMessageStatus, appendResult);
if (putMessageStatus == PutMessageStatus.PUT_OK) {
// Statistics
storeStatsService.getSinglePutMessageTopicTimesTotal(finalTopic).incrementAndGet();
storeStatsService.getSinglePutMessageTopicSizeTotal(msg.getTopic()).addAndGet(appendResult.getWroteBytes());
}
return putMessageResult;
});
wait dledgerFuture complete。I looked at the code inside ，all actions is
asynch，and use completableFuture。
this metrics result：
count = 30686435
min = 0
max = 4
mean = 1.40
stddev = 0.64
median = 1.00
75% <= 2.00
95% <= 2.00
98% <= 2.00
99% <= 2.00
99.9% <= 4.00
4.9.1、 jdk 11 、zgc.、and tps 1.8w ,msgsize 1k. and also execute os.sh.
producer avg ms 1.7ms，remove the network delay of 0.3ms. so raft is
bottleneck
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