[ http://issues.apache.org/jira/browse/JAMES-720?page=all ]
Joachim Draeger reassigned JAMES-720:
-------------------------------------
Assignee: Joachim Draeger
> STATUS command performance
> --------------------------
>
> Key: JAMES-720
> URL: http://issues.apache.org/jira/browse/JAMES-720
> Project: James
> Issue Type: Improvement
> Components: IMAPServer
> Affects Versions: Trunk
> Environment: evolution email client
> Reporter: Robert Burrell Donkin
> Assigned To: Joachim Draeger
> Attachments: STATUS-perf.patch
>
>
> I've been running my server for a little while with extra performance logging
> to try to work out why it's sluggish.
> The command parsing is orders of magnitudes faster than the data access.
> The reasons seems to be the performance of the STATUS command. Since STATUS
> is typically called every couple of minutes for every mail box visible on
> screen, it's quite a significant issue for this email client. (some other
> clients use SEARCH instead but this is no currently supported.)
> This performance seems to worsen quickly as the number of messages in the box
> increases.
> On my box:
> STATUS on an empty mailbox with three empty sub mailboxes takes ~45 ms
> STATUS on a mailbox with ~10 read messages takes ~100ms
> STATUS on a mailbox with ~ 50 messages with 40 unread takes ~450ms
> STATUS on a mailbox with ~ 150 with 40 unread takes ~1800ms
> STATUS on a mailbox with ~ 570 unread messages takes ~6600ms
> Any clues about where to start looking?
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