[jira] Commented: (COUCHDB-449) Turn off delayed commits by default

["Jason Davies (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/COUCHDB-449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12739403#action_12739403 ] 

Jason Davies commented on COUCHDB-449:
--------------------------------------

+1. Can we make this a config setting? delayed_commits = false by default but can be turned on for a node for speed junkies.

> 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
>            Priority: Blocker
>             Fix For: 0.10
>
>
> 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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