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https://issues.apache.org/jira/browse/HBASE-12682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jerry He updated HBASE-12682:
-----------------------------
Description:
While doing some compaction tuning and looking up some of the parameters, I
noticed that hbase.regionserver.thread.compaction.throttle default value in the
documentation and in hbase-site.xml seems to be off the mark.
{code}
<property>
<name>hbase.regionserver.thread.compaction.throttle</name>
<value>2560</value>
<description>There are two different thread pools for compactions, one for
large compactions and
the other for small compactions. This helps to keep compaction of lean
tables (such as
<systemitem>hbase:meta</systemitem>) fast. If a compaction is larger
than this threshold, it
goes into the large compaction pool. In most cases, the default value is
appropriate. Default:
2 x hbase.hstore.compaction.max x hbase.hregion.memstore.flush.size
(which defaults to 128).
The value field assumes that the value of
hbase.hregion.memstore.flush.size is unchanged from
the default.</description>
</property>
{code}
It should be in bytes. Or am I missing anything?
It is not a problem in 0.98 since the property is not in hbase-site.xml over
there. It is obtained dynamically:
{code}
throttlePoint = conf.getLong("hbase.regionserver.thread.compaction.throttle",
2 * maxFilesToCompact * storeConfigInfo.getMemstoreFlushSize());
{code}
was:
While doing some compaction tuning and looking up some of the parameters, I
noticed that hbase.regionserver.thread.compaction.throttle default value in the
documentation and in hbase-site.xml seems to be off the mark.
{code}
<property>
<name>hbase.regionserver.thread.compaction.throttle</name>
<value>2560</value>
<description>There are two different thread pools for compactions, one for
large compactions and
the other for small compactions. This helps to keep compaction of lean
tables (such as
<systemitem>hbase:meta</systemitem>) fast. If a compaction is larger
than this threshold, it
goes into the large compaction pool. In most cases, the default value is
appropriate. Default:
2 x hbase.hstore.compaction.max x hbase.hregion.memstore.flush.size
(which defaults to 128).
The value field assumes that the value of
hbase.hregion.memstore.flush.size is unchanged from
the default.</description>
</property>
{code}
It should be in bytes. Or am I missing anyting?
It is not a problem in 0.98 since the property is not in hbase-site.xml over
there. It is obtained dynamically:
{code}
throttlePoint = conf.getLong("hbase.regionserver.thread.compaction.throttle",
2 * maxFilesToCompact * storeConfigInfo.getMemstoreFlushSize());
{code}
> compaction thread throttle value is not correct in hbase-default.xml
> --------------------------------------------------------------------
>
> Key: HBASE-12682
> URL: https://issues.apache.org/jira/browse/HBASE-12682
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 2.0.0
> Reporter: Jerry He
> Assignee: Jerry He
> Fix For: 2.0.0
>
>
> While doing some compaction tuning and looking up some of the parameters, I
> noticed that hbase.regionserver.thread.compaction.throttle default value in
> the documentation and in hbase-site.xml seems to be off the mark.
> {code}
> <property>
> <name>hbase.regionserver.thread.compaction.throttle</name>
> <value>2560</value>
> <description>There are two different thread pools for compactions, one
> for large compactions and
> the other for small compactions. This helps to keep compaction of lean
> tables (such as
> <systemitem>hbase:meta</systemitem>) fast. If a compaction is larger
> than this threshold, it
> goes into the large compaction pool. In most cases, the default value
> is appropriate. Default:
> 2 x hbase.hstore.compaction.max x hbase.hregion.memstore.flush.size
> (which defaults to 128).
> The value field assumes that the value of
> hbase.hregion.memstore.flush.size is unchanged from
> the default.</description>
> </property>
> {code}
> It should be in bytes. Or am I missing anything?
> It is not a problem in 0.98 since the property is not in hbase-site.xml over
> there. It is obtained dynamically:
> {code}
> throttlePoint = conf.getLong("hbase.regionserver.thread.compaction.throttle",
> 2 * maxFilesToCompact * storeConfigInfo.getMemstoreFlushSize());
> {code}
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