[Dovecot] POP3 vs. IMAP Load/Memory usage in Dovecot 1.0.15

[David Ledger]

At 01:59 -0500 12/7/11, Stan Hoeppner wrote:
>On 7/12/2011 1:12 AM, Rainer Frey wrote:
>>
>>  On 11.07.2011, at 17:03, Stan Hoeppner wrote:
>>
>>>  The R410 is a two socket Xeon box with max 2 x 6 core CPUs.  The 24 CPUs
>>>  you see is the result of HyperThreading being enabled.  I'd disable HT
>>>  if I were you, or those boxen mine.
>>
>>  Why?
>
>It's a troubleshooting step.  HT can cause weird problems with some
>systems/kernels.  It can also decrease performance with some workloads.
>  As with anything, if it doesn't provide benefit, turn if off to reduce
>complexity and potential problems.

Or, another way, HT only helps when having twice as many (apparent) 
processors running at half the (effective) speed is good for your 
specific workload. Just because it's a band-waggon it doesn't mean 
you have to jump onto it.

David


-- 
David Ledger - Freelance Unix Sysadmin in the UK.
HP-UX specialist of hpUG technical user group (www.hpug.org.uk)
david.ledger at ivdcs.co.uk
www.ivdcs.co.uk