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https://issues.apache.org/jira/browse/CASSANDRA-10407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14976306#comment-14976306
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Benedict commented on CASSANDRA-10407:
--------------------------------------
All of these tests seem to be on compressed random datasets? Certainly the
problem of pooling here is an issue (that Branimir has filed a separated fix
for), but a larger issue is that we cannot obtain any benefit from this patch
on this workload, since we can have no effect on the size of data we read (it's
fixed to the compressed data size).
This patch can only really meaningfully help buffered reads of uncompressed
data, so that's probably what we should be benchmarking.
> Benchmark and evaluate CASSANDRA-8894 improvements
> --------------------------------------------------
>
> Key: CASSANDRA-10407
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10407
> Project: Cassandra
> Issue Type: Test
> Reporter: Aleksey Yeschenko
> Assignee: Alan Boudreault
> Fix For: 3.0.0
>
> Attachments: 3_0_head_mmap_wo_ra.nps, 3_0_head_std_wo_ra.nps,
> 8894_tiny.yaml, allocateDirect.png, flight-recordings.tar.gz,
> reBufferStandardTime.png, size.png, test-with-8894-tiny.json,
> test-without-8894-tiny.json
>
>
> The original ticket (CASSANDRA-8894) was committed to 3.0 alpha1 two months
> ago. We need to get proper performance tests before GA.
> See [~benedict]'s
> [comment|https://issues.apache.org/jira/browse/CASSANDRA-8894?focusedCommentId=14631203&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14631203]
> for more details.
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