Andrey Yegorov created BOOKKEEPER-968:
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Summary: Entry log flushes happen on log rotation and cause long
spikes in IO utilization
Key: BOOKKEEPER-968
URL: https://issues.apache.org/jira/browse/BOOKKEEPER-968
Project: Bookkeeper
Issue Type: Improvement
Components: bookkeeper-server
Affects Versions: 4.5.0
Reporter: Andrey Yegorov
Assignee: Andrey Yegorov
Priority: Minor
Caught this issue on the servers with 128G of RAm. This is probably not an
issue on servers/VMs with less RAM.
With current implementation we end up with single entry log flush during log
rotation.
OS tries to flush everything as fast as possible and saturates disk. This
results in long periods of high latency (reads and writes).
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