[ic] Increasing semaphores arrays

Jon Jensen jon at endpoint.com
Tue Jul 15 17:35:38 UTC 2008

On Tue, 15 Jul 2008, Marty Tennison wrote:

> Has anyone else had problems with Interchange using to many semaphores? 
> It appears the number of semaphores arrays used by the "interchange" 
> service is increasing every time the kernel (shared memory/semaphore) 
> parameter is changed.  We found this by tracking down failed backups.

The only time I recall running out of semaphores was when running many (> 
50) Postgres clusters on the same server. And it was easy to fix.

What mode are you running Interchange in? (Is PreFork enabled?)

Are you using any nonstandard Perl modules?

I don't understand how "failed backups" would lead you anywhere with this. 
If you can explain that in more detail I might get a better picture of 
what's going on.


Jon Jensen
End Point Corporation

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