Recent (probably MacOS) mail app provoking endless cyrus.index writes on 2.3 server.

[Bryan Hill]

On Oct 23, 2015, at 2:03 PM, ktm at rice.edu wrote:
> 
> On Fri, Oct 23, 2015 at 10:59:08PM +0200, Eric Luyten wrote:
>> On Tue, October 13, 2015 3:26 pm, ktm at rice.edu wrote:
>> 
>>> The El Capitan Mac Mail was recently released. It definitely has a problem.
>>> We saw our typical sync log size go from 10k when busy to 100k+. We are going
>>> to recommend that people wait to upgrade to that release until the problem is
>>> addressed.
>>> 
>>> Regards,
>>> Ken
>> 
>> 
>> Earlier today I used DTrace to capture I/O operations on our Solaris 10 mail
>> server.
>> The imapd processes hammered by those El Capitan Mail.app clients perform
>> roughly 500 (five hundred) cyrus.index + cyrus.cache rewrites per second.
>> Multiply by the number of affected users, now numbering beyond one hundred.
>> Cool.
>> 
>> 
>> Eric.
>> 
> 
> Hi Eric,
> 
> A bug in cyrus-imapd version 2.3.x. I am looking into generating an rpm
> with a patch. In the meantime, we are disabling the automatic folder compaction
> option to keep from hammering the server.
> 
> Regards,
> Ken
> 

Glad I found this thread. :)

I’m now seeing this on our 2.3.x server.  We had maybe 3-5 people upgrade to El Capitan so far, and I’m seeing the described behavior.

Would greatly appreciate an RPM with a patch!


Thanks,
Bryan

---
Bryan Hill
Lead System Administrator
UCSD Physics Computing Facility

9500 Gilman Dr. # 0319
La Jolla, CA 92093
+1-858-534-5538
bhill at ucsd.edu