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https://issues.apache.org/jira/browse/BOOKKEEPER-968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15670059#comment-15670059
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Jia Zhai edited comment on BOOKKEEPER-968 at 11/16/16 10:22 AM:
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[~hustlmsp], should we add items in doc/bookkeeperConfigParams.textile along
with this changes?
In this link:
https://cwiki.apache.org/confluence/display/BOOKKEEPER/Contributing+to+BookKeeper
it said:
New server configuration settings should be added and documented in
bookkeeper-server/conf/bk_server.conf, and also documented in
doc/bookkeeperConfigParams.textile.
But seems, this textile file contains only the tip of the iceberg, a lot of
config parameter is not added in. If needed, we may need a ticket to fix this.
was (Author: zhaijia):
@sijie , should we add items in doc/bookkeeperConfigParams.textile along with
this changes?
In this link:
https://cwiki.apache.org/confluence/display/BOOKKEEPER/Contributing+to+BookKeeper
it said:
New server configuration settings should be added and documented in
bookkeeper-server/conf/bk_server.conf, and also documented in
doc/bookkeeperConfigParams.textile.
But seems, this textile file contains only the tip of the iceberg, a lot of
config parameter is not added in. If needed, we may need a ticket to fix this.
> 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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