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Re: [OT] linux 3.10 kernel will improve ipc,sysv semaphore scalability - Mailing list pgsql-performance

From Shaun Thomas
Subject Re: [OT] linux 3.10 kernel will improve ipc,sysv semaphore scalability
Date
Msg-id 5151F026.5010409@optionshouse.com
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In response to [OT] linux 3.10 kernel will improve ipc,sysv semaphore scalability  (Andrea Suisani <sickpig@opinioni.net>)
Responses Re: [OT] linux 3.10 kernel will improve ipc,sysv semaphore scalability  (Andrea Suisani <sickpig@opinioni.net>)
Re: [OT] linux 3.10 kernel will improve ipc,sysv semaphore scalability  (Andrea Suisani <sickpig@opinioni.net>)
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On 03/26/2013 08:04 AM, Andrea Suisani wrote:

> TPS:
> 100 users: 1257.21 (vanilla)    2805.06 (v3 patchset)
> 400 users: 1437.57 (vanilla)    2664.67 (v3 patchset)
> 800 users: 1236.89 (vanilla)    2750.73 (v3 patchset)

Wow, I like the look of that. I wonder how this reacts with disabled
autogrouping and increasing sched_migration_cost. If the completely fair
scheduler has less locking contention with this patch-set, those tweaks
may not even be necessary. I need to see if I can find a system to test on.

--
Shaun Thomas
OptionsHouse | 141 W. Jackson Blvd. | Suite 500 | Chicago IL, 60604
312-676-8870
sthomas@optionshouse.com

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