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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-6841) Derby v10.12.1.1 is horribly slow compared to v10.11.1.1 in embedded mode
Date Sat, 07 Nov 2015 16:40:11 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14995282#comment-14995282
] 

Rick Hillegas commented on DERBY-6841:
--------------------------------------

Are you running under a SecurityManager? There may be more performance regressions related
to the work on https://issues.apache.org/jira/browse/DERBY-6751 or its sister issues. Thanks.

> Derby v10.12.1.1 is horribly slow compared to v10.11.1.1 in embedded mode
> -------------------------------------------------------------------------
>
>                 Key: DERBY-6841
>                 URL: https://issues.apache.org/jira/browse/DERBY-6841
>             Project: Derby
>          Issue Type: Bug
>          Components: JDBC, SQL
>    Affects Versions: 10.12.1.1
>         Environment: OS: Windows, OS X, Linux
> CPU: Quad-Core Intel i5
> App: Swing, multi-threaded
>            Reporter: Xavion
>             Fix For: 10.11.1.1
>
>
> It takes much longer to open, read, and close embedded databases using v10.12.1.1 than
it did with v10.11.1.1.  What ever changes you guys made over the last year and a bit have
definitely been for the worse.
> Below are the results of the repetition tests I've just run on the same computer with
the same databases.  Let me know if you need to know about the sizes of the databases and/or
the file type they contain.
> Connecting with v10.11.1.1:
> Database opened in 0.82 seconds.
> Database opened in 0.77 seconds.
> Database opened in 0.88 seconds.
> Database opened in 0.77 seconds.
> Database opened in 0.77 seconds.
> Database opened in 0.96 seconds.
> Database opened in 0.74 seconds.
> Connecting with v10.12.1.1:
> Database opened in 1.98 seconds.
> Database opened in 2.07 seconds.
> Database opened in 1.97 seconds.
> Database opened in 2.01 seconds.
> Database opened in 2.01 seconds.
> Database opened in 2.00 seconds.
> Database opened in 2.03 seconds.
> Reading with v10.11.1.1:
> Database processed in 6.17 seconds.
> Database processed in 4.00 seconds.
> Database processed in 3.67 seconds.
> Database processed in 3.66 seconds.
> Database processed in 3.78 seconds.
> Database processed in 3.69 seconds.
> Database processed in 3.74 seconds.
> Reading with v10.12.1.1:
> Database processed in 7.29 seconds.
> Database processed in 4.54 seconds.
> Database processed in 4.88 seconds.
> Database processed in 4.65 seconds.
> Database processed in 4.34 seconds.
> Database processed in 4.35 seconds.
> Database processed in 4.50 seconds.
> Disconnecting with v10.11.1.1:
> Database closed in 0.11 seconds.
> Database closed in 0.13 seconds.
> Database closed in 0.15 seconds.
> Database closed in 0.14 seconds.
> Database closed in 0.10 seconds.
> Database closed in 0.13 seconds.
> Database closed in 0.14 seconds.
> Disconnecting with v10.12.1.1:
> Database closed in 0.74 seconds.
> Database closed in 0.87 seconds.
> Database closed in 0.76 seconds.
> Database closed in 0.87 seconds.
> Database closed in 0.85 seconds.
> Database closed in 0.69 seconds.
> Database closed in 0.84 seconds.



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