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Date: Mon, 1 Feb 2010 21:02:18 +0000 (UTC)
From: "Jan Lehnardt (JIRA)" <jira@apache.org>
To: dev@couchdb.apache.org
Subject: [jira] Resolved: (COUCHDB-449) Turn off delayed commits by default
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     [ https://issues.apache.org/jira/browse/COUCHDB-449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jan Lehnardt resolved COUCHDB-449.
----------------------------------

    Resolution: Fixed

I call lazy consensus that we keep delayed_commits on by default. Please reopen if you disagree.

> Turn off delayed commits by default
> -----------------------------------
>
>                 Key: COUCHDB-449
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-449
>             Project: CouchDB
>          Issue Type: Bug
>          Components: Database Core
>    Affects Versions: 0.9, 0.9.1
>            Reporter: Jan Lehnardt
>            Assignee: Adam Kocoloski
>            Priority: Blocker
>             Fix For: 0.11
>
>         Attachments: delayed_commits_v1.patch, slow.rb
>
>
> Delayed commits make CouchDB significantly faster. They also open a one second window for data loss. In 0.9 and trunk, delayed commits are enabled by default and can be overridden with HTTP headers and an explicit API call to flush the write buffer. I suggest to turn off delayed commits by default and use the same overrides to enable it per request. A per-database option is possible, too.
> One concern is developer workflow speed. The setting affects the test suite performance significantly. I'd opt to change couch.js to set the appropriate header to enable delayed commits for tests.
> CouchDB should guarantee data safety first and speed second, with sensible overrides.

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