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From Jeff Trawick <>
Subject Re: [PATCH] worker MPM: reuse transaction pools
Date Tue, 28 Aug 2001 11:03:59 GMT
Aaron Bannert <> writes:

> This patch implements a resource pool of context pools -- a queue of
> available pools that the listener thread can pull from when accepting
> a request. The worker thread that picks up that request then uses
> that pool for the lifetime of that transaction, clear()ing the pool
> and releasing it back to what I'm calling the "pool_queue" (har har).
> This replaces the prior implementation that would create and destroy
> a transaction pool for each and every request.

(surely I'm missing something here... need to brew some coffee...)

It seems that you allocate a ptrans for every thread but rather than
store it in some thread-specific data you treat it like a shared
resource, storing it in a queue, which introduces serialization and
other overhead.

If every thread has a ptrans, which it should, this overhead is
unnecessary; the ptrans shouldn't be held in a shared data structure.

Jeff Trawick | | PGP public key at web site:
             Born in Roswell... married an alien...

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