Re: [Sqlrelay-discussion] Dead children (zombies and sem undo)

[David M. <dav...@fi...>]

Renat,

This will definitely improve things, but maybe we should just make the 
scaler call reapChildren when it receives a SIGCHLD.  Can you think of 
any reason why we shouldn't do that?

Dave

On 06/29/2011 11:34 AM, Renat Sabitov wrote:
> Hi David,
>
> Did you mention that zombie connections hanging around when scaler 
> does not receive signal(6) for some time? I made a patch that use 
> timed wait() on sem(6) and reap dead children every 5 seconds.
>
> This patch solve one more issue. Did you know that undo information on 
> semaphore operations processed after process completely dies, i.e. 
> after the father executes waitpid(). For this reason it is very 
> important to reap children in time.
>
>
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