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From "Adam Kocoloski (JIRA)" <j...@apache.org>
Subject [jira] Commented: (COUCHDB-1054) Better couch_log performance
Date Wed, 02 Feb 2011 19:11:29 GMT

    [ https://issues.apache.org/jira/browse/COUCHDB-1054?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12989755#comment-12989755
] 

Adam Kocoloski commented on COUCHDB-1054:
-----------------------------------------

Hi Volker, Filipe was only addressing whether the timestamp should be inserted by the client
process or by the logger itself.  If done by the client process it's possible that timestamps
may not monotonically increase.  We'll certainly continue to insert timestamps in the log
files.


> Better couch_log performance
> ----------------------------
>
>                 Key: COUCHDB-1054
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-1054
>             Project: CouchDB
>          Issue Type: Improvement
>            Reporter: Filipe Manana
>            Assignee: Filipe Manana
>         Attachments: COUCHDB-1054-2.patch, COUCHDB-1054.patch
>
>
> Building the messages to write to the console and the log file can be done outside the
couch_log gen_event. This significantly increases the parallelism when many processes log
messages. The following relaximation test graph shows a throughput increase using the attached
patch against current trunk:
> http://graphs.mikeal.couchone.com/#/graph/0379dbdaef29b1c0fbf03421540243f7

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