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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5206) Investigate reduced throughput in some of the nightly performance tests
Date Wed, 27 Apr 2011 11:53:03 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13025750#comment-13025750
] 

Knut Anders Hatlen commented on DERBY-5206:
-------------------------------------------

The tests are invoked using the following command line in the nightly testing (for the single-threaded
variants):

java -Dderby.storage.pageCacheSize=25000 org.apache.derbyTesting.perf.clients.Runner -init
-load sr_select -load_opts nonIndexed -wt 60 -rt 600

java -Dderby.storage.pageCacheSize=25000 org.apache.derbyTesting.perf.clients.Runner -init
-load bank_tx -wt 60 -rt 600

> Investigate reduced throughput in some of the nightly performance tests
> -----------------------------------------------------------------------
>
>                 Key: DERBY-5206
>                 URL: https://issues.apache.org/jira/browse/DERBY-5206
>             Project: Derby
>          Issue Type: Task
>          Components: SQL
>    Affects Versions: 10.8.1.2
>         Environment: Solaris 10 5/08 s10x_u5wos_10 X86
> java version "1.6.0"
> Java(TM) SE Runtime Environment (build 1.6.0-b105)
> Java HotSpot(TM) Server VM (build 1.6.0-b105, mixed mode)
>            Reporter: Knut Anders Hatlen
>
> The last two months, the nightly performance regression tests (http://home.online.no/~olmsan/derby/perf/)
have shown results that are slightly lower than normal for the following test:
> - Single Record Select, Non-primary non-indexed column - http://home.online.no/~olmsan/derby/perf/select_sec_noindex_1y.html
> - TPC-B like load (aka bank_tx) - http://home.online.no/~olmsan/derby/perf/tpcb_1y.html
> For example, when averaging the results from 2011-03-01 to 2011-04-26 and comparing them
to the average for the two preceding months (2011-01-01 to 2011-03-01), I see these changes:
> Select, single-threaded: 17.05 tx/s -> 16.81 tx/s (down 1.4%)
> Select, 4 threads: 25.50 tx/s -> 24.70 tx/s (down 3.1%)
> Select, 16 threads: 25.17 tx/s -> 24.47 tx/s (down 2.8%)
> bank_tx, single-threaded: 1931 tx/s -> 1904 tx/s (down 1.4%)
> bank_tx, 4 threads: 2628 tx/s -> 2589 tx/s (down 1.5%)
> bank_tx, 16 threads: 3584 tx/s -> 3519 tx/s (down 1.8%)

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