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https://issues.apache.org/jira/browse/COUCHDB-1009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13139626#comment-13139626
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Filipe Manana commented on COUCHDB-1009:
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Thanks for reminding about this Jan.
Regarding your question, no it's not needed. For each attachment we write, we
instantiate a couch_stream gen_server, which is then closed after writing the
attachment. Therefore once the .ini parameter is updated, it only affects
subsequent attachment writes. I think this is perfectly fine.
> Make couch_stream buffer configurable
> -------------------------------------
>
> Key: COUCHDB-1009
> URL: https://issues.apache.org/jira/browse/COUCHDB-1009
> Project: CouchDB
> Issue Type: Improvement
> Components: Database Core
> Environment: trunk
> Reporter: Filipe Manana
> Assignee: Filipe Manana
> Priority: Trivial
> Attachments: COUCHDB-1009-2.patch, COUCHDB-1009-rebased.patch,
> 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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