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richard at scholarpack

May 22, 2013, 12:38 AM

Post #1 of 4 (172 views)
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Thread Number

Is there anything important to consider when increasing the thread count above 7 as outlined here in 24.4.2/3: http://docs.zope.org/zope2/zope2book/MaintainingZope.html

I have tried to 10 but encounter problems with number of open file descriptions on Centos 6.
Cheers
Rich

lists at zopyx

May 22, 2013, 12:42 AM

Post #2 of 4 (159 views)
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Re: Thread Number [In reply to]

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Reducing the number of threads (down to 1) and having multiple
app-servers is usually the way to go instead of increasing the number
of threads.

- -aj

Richard Harley wrote:
> Is there anything important to consider when increasing the thread
> count above 7 as outlined here in 24.4.2/3:
> http://docs.zope.org/zope2/zope2book/MaintainingZope.html
>
> I have tried to 10 but encounter problems with number of open file
> descriptions on Centos 6. Cheers Rich
>
> _______________________________________________ Zope maillist -
> Zope [at] zope https://mail.zope.org/mailman/listinfo/zope ** No
> cross posts or HTML encoding! ** (Related lists -
> https://mail.zope.org/mailman/listinfo/zope-announce
> https://mail.zope.org/mailman/listinfo/zope-dev )

- --
ZOPYX Limited | Python | Zope | Plone | MongoDB
Hundskapfklinge 33 | Consulting & Development
D-72074 Tübingen | Electronic Publishing Solutions
www.zopyx.com | Scalable Web Solutions
- --------------------------------------------------
Produce & Publish - www.produce-and-publish.com

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richard at scholarpack

May 22, 2013, 1:17 AM

Post #3 of 4 (157 views)
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Re: Thread Number [In reply to]

Noted, thanks

On 22 May 2013, at 08:42, Andreas Jung <lists [at] zopyx> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Reducing the number of threads (down to 1) and having multiple
> app-servers is usually the way to go instead of increasing the number
> of threads.
>
> - -aj
>
> Richard Harley wrote:
>> Is there anything important to consider when increasing the thread
>> count above 7 as outlined here in 24.4.2/3:
>> http://docs.zope.org/zope2/zope2book/MaintainingZope.html
>>
>> I have tried to 10 but encounter problems with number of open file
>> descriptions on Centos 6. Cheers Rich
>>
>> _______________________________________________ Zope maillist -
>> Zope [at] zope https://mail.zope.org/mailman/listinfo/zope ** No
>> cross posts or HTML encoding! ** (Related lists -
>> https://mail.zope.org/mailman/listinfo/zope-announce
>> https://mail.zope.org/mailman/listinfo/zope-dev )
>
> - --
> ZOPYX Limited | Python | Zope | Plone | MongoDB
> Hundskapfklinge 33 | Consulting & Development
> D-72074 Tübingen | Electronic Publishing Solutions
> www.zopyx.com | Scalable Web Solutions
> - --------------------------------------------------
> Produce & Publish - www.produce-and-publish.com
>
>
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sdupton at gmail

May 28, 2013, 9:25 AM

Post #4 of 4 (142 views)
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Re: Thread Number [In reply to]

On Wed, May 22, 2013 at 2:17 AM, Richard Harley <richard [at] scholarpack> wrote:
> Noted, thanks

Oh, and if you have some kind of health-checks polling your instances,
it may make sense (I have no evidence, just a hunch) to add one more
thread to keep that stuff from getting in your way (e.g. munin.zope
checks, haproxy heath polling with OPTIONS request, etc).

OTOH, maybe the tiny requests like the haproxy checks don't really
block for long enough to matter, even if they run every few seconds.

Sean
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