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From "Filipe Manana (JIRA)" <>
Subject [jira] Commented: (COUCHDB-1009) Make couch_stream buffer configurable
Date Mon, 03 Jan 2011 14:50:45 GMT


Filipe Manana commented on COUCHDB-1009:

That's absolutely right Robert. But it might depend on the number of concurrent writers one
expects, the size of the attachments and documents added/updated, etc. And that's another
reason I think why it should be configurable and not hardcoded.

> Make couch_stream buffer configurable
> -------------------------------------
>                 Key: COUCHDB-1009
>                 URL:
>             Project: CouchDB
>          Issue Type: Improvement
>          Components: Database Core
>         Environment: trunk
>            Reporter: Filipe Manana
>            Assignee: Filipe Manana
>            Priority: Trivial
>         Attachments: COUCHDB-1009.patch
> The couch_stream buffer is hardcoded to 4Kb.
> This value should be configurable. Larger values can improve write and specially read
performance (if we write larger chunks to disk, we have higher chances of reading more contiguous
disk blocks afterwards). 
> I also think it's a good idea to change the default value from 4Kb to something higher
(64Kb for e.g.).
> Patch attached

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