Andrew Purtell created ZOOKEEPER-2662:
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Summary: Export a metric for txn log sync times
Key: ZOOKEEPER-2662
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2662
Project: ZooKeeper
Issue Type: Improvement
Reporter: Andrew Purtell
In FileTxnLog there is code that records the amount of time required to fsync
the txn log in order to warn if that time exceeds a configurable threshold.
This information should also be exported as a metric available by JMX so an
important aspect of quorum performance can be monitored.
ZooKeeperServerMXBean carries some global latency information for the server
process already, seems like a good place to put it if not an entirely new bean
for the TxnLog. After ZOOKEEPER-2310 might want to collect the same information
for snapshots.
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