Re: Using Threads

On Tue, 6 Feb 2001, Myron Scott wrote:

> There are many many globals I had to work around including all the memory
> management stuff. I basically threw everything into and "environment"
> variable which I stored in a thread specific using thr_setspecific.

Yes, it's good. I working on multi-thread application server
(http://mape.jcu.cz) and I use for this project some things from PG (like
mmgr), I planning use same solution.

> Performance is acually very good for what I am doing. I was able to batch
> commit transactions which cuts down on fsync calls, use prepared
> statements from my client using CORBA, and the various locking calls for
> the threads (cond_wait,mutex_lock, and sema_wait) seem pretty fast. I did
> some performance tests for inserts
>
> 20 clients, 900 inserts per client, 1 insert per transaction, 4 different
> tables.
>
> 7.0.2 About 10:52 average completion
> multi-threaded 2:42 average completion
> 7.1beta3 1:13 average completion

It is very very good for time for 7.1, already look forward to 7.2! :-)

BTW, I not sure if you anytime in future will see threads in
official PostgreSQL and if you spending time on relevant things (IMHO).

Karel