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https://issues.apache.org/jira/browse/HBASE-29252?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Charles Connell updated HBASE-29252:
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Description:
I've looked at a lot of allocation profiles of RegionServers doing a read-heavy
workload. Some allocations that dominate the chart can be easily avoided. The
class {{RowIndexSeekerV1.SeekerState}} contains a {{ByteBufferKeyOnlyKeyValue}}
field that is replaced on every row read. This object can be reset and re-used
instead.
On the attached profile, allocations of this object account for 9% of the
allocations done. This is from a load test and is not necessarily
representative of your traffic patterns.
was:I've looked at a lot of allocation profiles of RegionServers doing a
read-heavy workload. Some allocations that dominate the chart can be easily
avoided. The class {{RowIndexSeekerV1.SeekerState}} contains a
{{ByteBufferKeyOnlyKeyValue}} field that is replaced on every row read. On the
attached profile, this accounts for 9% of the allocations done. This object can
be reset and re-used instead.
> Avoid allocating a new ByteBufferKeyOnlyKeyValue on every row processed by
> RowIndexSeekerV1
> -------------------------------------------------------------------------------------------
>
> Key: HBASE-29252
> URL: https://issues.apache.org/jira/browse/HBASE-29252
> Project: HBase
> Issue Type: Improvement
> Reporter: Charles Connell
> Assignee: Charles Connell
> Priority: Minor
> Attachments: scenario-alloc-hs26.html
>
>
> I've looked at a lot of allocation profiles of RegionServers doing a
> read-heavy workload. Some allocations that dominate the chart can be easily
> avoided. The class {{RowIndexSeekerV1.SeekerState}} contains a
> {{ByteBufferKeyOnlyKeyValue}} field that is replaced on every row read. This
> object can be reset and re-used instead.
> On the attached profile, allocations of this object account for 9% of the
> allocations done. This is from a load test and is not necessarily
> representative of your traffic patterns.
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