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From "Jan Lehnardt (JIRA)" <>
Subject [jira] Created: (COUCHDB-449) Turn off delayed commits by default
Date Tue, 04 Aug 2009 18:58:14 GMT
Turn off delayed commits by default

                 Key: COUCHDB-449
             Project: CouchDB
          Issue Type: Bug
          Components: Database Core
    Affects Versions: 0.9.1, 0.9
            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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