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From "Daniel John Debrunner (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2369) NetworkServerControl.shutdown() takes at least 1.5 seconds, could be faster.
Date Fri, 23 Feb 2007 15:05:06 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2369?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12475350
] 

Daniel John Debrunner commented on DERBY-2369:
----------------------------------------------

Thanks for the comment Knut Anders. yes i was running on windows. The patch doesn't include
the second change to reduce the sleep time, that should decrease the time on Solaris.

> NetworkServerControl.shutdown() takes at least 1.5 seconds, could be faster.
> ----------------------------------------------------------------------------
>
>                 Key: DERBY-2369
>                 URL: https://issues.apache.org/jira/browse/DERBY-2369
>             Project: Derby
>          Issue Type: Improvement
>          Components: Network Server, Performance
>            Reporter: Daniel John Debrunner
>         Assigned To: Daniel John Debrunner
>            Priority: Minor
>             Fix For: 10.3.0.0
>
>         Attachments: derby2369_reuse_socket.txt
>
>
> The shutdown command takes at least 1.5 seconds, broken into two parts:
>   - 0.5 seconds is the first sleep after the shutdown request and before the first ping
to see if the server is shutdown.
>   - ~1 second is the time trying to obtain a socket in order to perform the ping to see
if the server is shutdown. This socket creation fails (correctly) but takes time to do so.
> The socket creation time can be avoided by re-using the socket that was used to send
the shutdown request.
> The sleep time could be reduced by sleeping on a finer granularity, 0.5secs is a long
time for a modern processor.

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