Re[4]: [HACKERS] Re: [PATCHES] A patch for xlog.c

2001-02-27 Thread The Hermit Hacker

On Tue, 27 Feb 2001, Xu Yifeng wrote:

 Hello Tom,

 Tuesday, February 27, 2001, 12:45:18 PM, you wrote:

 TL Bruce Momjian [EMAIL PROTECTED] writes:
  I know it is easy for you, but the number of reports and problems we
  hear about shows it is an issue for some.

 TL We hear some reports, but not a lot.  We have no idea whatever what
 TL problems might ensue if we used mmap instead.  I'm dubious that SysV
 TL shmem creates enough problems to justify replacing it with a solution
 TL of essentially unknown portability characteristics...

 TL regards, tom lane

 could anyone investigate mmap() in many modern UNIX systems to prove that
 mmap() is so un-portable?

 it seems mmap() is a portable problem like you said, but I think SYSV
 shmem for PGSQL is a installation problem. you push some difficults to
 end user, and take easy taskes for yourself.

Considering that, so far as I can tell, both you and Bruce are the only
ones that are really heavy on moving away from SysV ... how many ppl are
actually finding it to be that much more difficult? :)





Re[4]: [HACKERS] Re: [PATCHES] A patch for xlog.c

2001-02-26 Thread Xu Yifeng

Hello Tom,

Tuesday, February 27, 2001, 12:45:18 PM, you wrote:

TL Bruce Momjian [EMAIL PROTECTED] writes:
 I know it is easy for you, but the number of reports and problems we
 hear about shows it is an issue for some.

TL We hear some reports, but not a lot.  We have no idea whatever what
TL problems might ensue if we used mmap instead.  I'm dubious that SysV
TL shmem creates enough problems to justify replacing it with a solution
TL of essentially unknown portability characteristics...

TL regards, tom lane

could anyone investigate mmap() in many modern UNIX systems to prove that
mmap() is so un-portable?

it seems mmap() is a portable problem like you said, but I think SYSV
shmem for PGSQL is a installation problem. you push some difficults to
end user, and take easy taskes for yourself.

Xu Yifeng