Re: Pause while selecting INBOX

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Sat, Sep 27, 2008 at 01:46:39PM +1000, Rob Mueller wrote:
> 
> >
> >Where's the first place to look for this problem?  I/O statistics
> >show a higher read bandwidth while the backup is running, but writes
> >still dominate.  The backup would typically read all of the files in
> >a single Cyrus partition.
> 
> Some more information about your setup would be helpful.

I deliberately omitted that information, hoping that somebody would
know what happens on the server side when mutt says `selecting INBOX'.
I don't want to redesign the server at this stage, at least not until
I've isolated the problem.

> 1. Make sure you have noatime (and nodiratime if applicable) set on your FS
> 2. If on linux, use the deadline IO scheduler
> 3. If you can, split your data and meta data onto separate volumes 
> (probably a lot of work)
> 4. Install more RAM and use a 64-bit OS. x64_64 linux can cache many, many 
> more inodes and dentries in memory than x86 linux.
> 5. Upgrade to the latest cyrus and enable the status cache

Those are all good suggestions.  I'll investigate some of them.

-- 
-Gary Mills-    -Unix Support-    -U of M Academic Computing and Networking-
----
Cyrus Home Page: http://cyrusimap.web.cmu.edu/
Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki
List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html

[Index of Archives]     [Cyrus SASL]     [Squirrel Mail]     [Asterisk PBX]     [Video For Linux]     [Photo]     [Yosemite News]     [gtk]     [KDE]     [Gimp on Windows]     [Steve's Art]

  Powered by Linux