Re: [HACKERS] egcs experimentation results

On Sun, 30 May 1999, Tom Lane wrote:

> Date: Sun, 30 May 1999 11:47:15 -0400
> From: Tom Lane <tgl@sss.pgh.pa.us>
> To: pgsql-hackers@postgreSQL.org
> Subject: [HACKERS] egcs experimentation results
> 
> For work-related reasons I recently had to install egcs 1.1.2 here.
> I thought I'd try Postgres with it, since we have at least two reports
> of problems seen only with egcs:
>     1. The business about char and short parameters to functions
>        called through fmgr;
>     2. Oleg's report of instability seen only with egcs and -O.

Tom,

the problem seems gone away after cleaning computer box with vacuum
machine and replacing cooler :-!  This could be goind to FAQ :-)

> 
> The upshot is that I found a few minor glitches in the configure
> script, and cleaned up two or three insignificant warnings that
> egcs generates but gcc doesn't.  I was *not* able to duplicate
> any instability using either -O2 or -O3.  The regression tests all
> pass, and Oleg's fifteen-way join test is happy too.
> 

I just run 60 tables join and it took 17 minutes
on my P200, 64Mb RAM and postgres compiled with -O2 -mpentium
I don't know how it's fast  but it works ! Just explain requires
15:30 minutes.
Oleg

> This is on an HP-PA box, which is not the same as the PowerPC that
> problem #1 was reported on, but is likewise a RISC architecture.
> So I was hopeful I would see that problem here.
> 
> So, now what?  From talking to Bruce off-list, I know that he's not
> eager to make changes as extensive as problem #1 appears to require
> on the strength of just one unconfirmed trouble report.  I think I
> have to agree...
> 
>             regards, tom lane
> 

_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83