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From "Filipe Manana (JIRA)" <>
Subject [jira] [Created] (COUCHDB-1218) Better logger performance
Date Tue, 12 Jul 2011 16:35:00 GMT
Better logger performance

                 Key: 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:

Here's a benchmark with relaximation, 50 writers, 100 readers, documents of 1Kb, delayed_commits
set to false and 'info' log level (default):

The reads got a better throughput (bottom graph, easier to visualize).

The patch (also attached here), which has a descriptive comment, is at:

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