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From "Xavion (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 Sun, 08 Nov 2015 23:28:11 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14995870#comment-14995870
] 

Xavion commented on DERBY-6841:
-------------------------------

In all cases, I'm using the "BUILTIN" authentication provider.  Also, after filling each database,
I "call SYSCS_UTIL.SYSCS_COMPRESS_TABLE()".

I'm confident you'll be able to reproduce this problem at your end.  I'm a pretty mainstream
kinda guy, so I'm not doing anything exotic with the databases :-).

> 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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