Mailing-List: contact dev-help@couchdb.apache.org; run by ezmlm
Precedence: bulk
Reply-To: dev@couchdb.apache.org
Date: Tue, 12 Jul 2011 16:35:00 +0000 (UTC)
From: "Filipe Manana (JIRA)" <jira@apache.org>
To: dev@couchdb.apache.org
Message-ID: 
 <670463833.6530.1310488500248.JavaMail.tomcat@hel.zones.apache.org>
In-Reply-To: 
 <620250853.6529.1310488500220.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Updated] (COUCHDB-1218) Better logger performance
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


     [ https://issues.apache.org/jira/browse/COUCHDB-1218?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Filipe Manana updated COUCHDB-1218:
-----------------------------------

    Attachment: 0001-Better-logger-performance.patch

> Better logger performance
> -------------------------
>
>                 Key: COUCHDB-1218
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-1218
>             Project: CouchDB
>          Issue Type: Improvement
>            Reporter: Filipe Manana
>            Assignee: Filipe Manana
>         Attachments: 0001-Better-logger-performance.patch
>
>
> I made some experiments with OTP's disk_log module (available since 2001 at least) to use it to manage the log file.
> It turns out I got better throughput by using it. Basically it adopts a strategy similar to the asynchronous couch_file Damien described in this thread:
> http://mail-archives.apache.org/mod_mbox/couchdb-dev/201106.mbox/%3C5C39FB5A-0ACA-4FF9-BD90-2EBECF271850@apache.org%3E
> Here's a benchmark with relaximation, 50 writers, 100 readers, documents of 1Kb, delayed_commits set to false and 'info' log level (default):
> http://graphs.mikeal.couchone.com/#/graph/9e19f6d9eeb318c70cabcf67bc013c7f
> The reads got a better throughput (bottom graph, easier to visualize).
> The patch (also attached here), which has a descriptive comment, is at:
> https://github.com/fdmanana/couchdb/compare/logger_perf.patch

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira