Re: Fw: Fw: bad performance on irix

Dear Tom,
The evidence is from the Process Activity Recorder, an Irix utility
similar to strace the reports syscall usage. A number of semop's are performed
in the operation of backend. Luis can send you specifics. --Bob

Luis Alberto Amigo Navarro writes:
> 
> 
> ----- Original Message -----
> From: "Tom Lane" <tgl@sss.pgh.pa.us>
> To: "Luis Alberto Amigo Navarro" <lamigo@atc.unican.es>
> Cc: <pgsql-hackers@postgresql.org>; "Robert E. Bruccoleri"
> <bruc@stone.congenomics.com>
> Sent: Monday, March 18, 2002 5:36 PM
> Subject: Re: Fw: [HACKERS] bad performance on irix
> 
> 
> > "Luis Alberto Amigo Navarro" <lamigo@atc.unican.es> forwards:
> > >> It's using the spinlocks
> > >> for some locks, but semaphores for others.
> >
> > That doesn't make any sense to me.  For one thing, if HAS_TEST_AND_SET
> > is defined in the config header, the executable will just plain fail to
> > build if there's no tas implementation, because lmgr/spin.c won't be
> > compiled.  And I sure don't see how some of the locks might be
> > implemented one way and some the other.
> >
> > Which ones do you think are being implemented as semaphores, and what's
> > your evidence?
> >
> > regards, tom lane
> >
> > ---------------------------(end of broadcast)---------------------------
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> >
> > http://www.postgresql.org/users-lounge/docs/faq.html
> >
> 
> 

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| Robert E. Bruccoleri, Ph.D. | email: bruc@acm.org                |
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