RE: Solaris memory management
Dirk,
I run 7.31.FD4 on Solaris 9. there is a line in the release notes (filename
IDS_7.3)
"The maximum size of any shared memory segment is 4294967295 bytes(approx.
4GB)."
I use RESIDENT -1, SHMVIRTSIZE 4096000 and SHMADD 2048000 and have 7
segments allocated (total 16Gb). With RESIDENT set, I cannot go over 4Gb for
each segment - see previous postings
id key addr size ovhd class blkused
blkfree
1501 1381517313 10a000000 4244635648 93264 R* 518070
74
1502 1381517314 207000000 4194304000 64624 V* 511999
1
1503 1381517315 301000000 1048576 640 M 79
49
1504 1381517316 302000000 2097152000 32624 V* 255614
386
1505 1381517317 37f000000 2097152000 32624 V* 254890
1110
1006 1381517318 3fc000000 2097152000 32624 V* 234331
21669
1007 1381517319 479000000 2097152000 32624 V* 96331
159669
Total: - - 16828596224 - - 1871314
182958
Regards
Colin
>From: "Dirk Moolman" <DirkM@mxgroup.co.za>
>To: "Rafael Padilla" <rafapadilla@yahoo.com>
>CC: <informix-list@iiug.org>
>Subject: RE: Solaris memory management
>Date: Tue, 12 Apr 2005 15:23:20 +0200
>
>My main concern is not Informix, but the limitation in the operating
>system. I had an AIX system, where I specified lots of memory in
>Informix, but AIX still had to break it up - could not handle such a
>large contigous chunk. I was not able to only have one virtual segment
>on this platform.
>
>I want to know if Solaris has the same limitation ?
>
>
>-----Original Message-----
>From: owner-informix-list@iiug.org [mailto:owner-informix-list@iiug.org]
>On Behalf Of Rafael Padilla
>Sent: 12 April 2005 12:19 AM
>To: informix-list@iiug.org
>Subject: Re: Solaris memory management
>
>Hi,
>
>On UNIX systems INFORMIX reserves memory in blocks( this is 8k each
>one).
>Your 20Gg of Memory are 20 Gb / 8Kb of contigous blocks. If you see
>in your onstat -g seg one virtual value, there are one contiguos
>Virtual segment. Otherwise, remember that INFORMIX manage a RESIDENT
>portion, that is other memory segment, so at the end the minimun
>segments in INFORMIX are one resident and one virtual.
>
>regards.
>
>
>"Dirk Moolman" <DirkM@mxgroup.co.za> wrote in message
>news:<1113225214.ca65008bf86f2917538be43fa3fc8841@teranews>...
> > I am trying to find out what the limit is on contiguous memory in
> > Solaris. Can I grab one segment of 20G, or will Solaris break the
> > segment down into smaller pieces ?
> >
> > For example, if I run onstat -g seg, can I have one segment of 20G, or
> > is this not possible ?
> >
> > I am using Solaris 9 and IDS 7.31 FD3 ...... 64bit
> >
> >
> >
> >
> >
> > Dirk Moolman
> > Database and Unix Administrator
> > MXGROUP
> >
> >
> >
> > "People demand freedom of speech as a compensation for the freedom of
> > thought which they seldom use."
> >
> > sending to informix-list
>
>sending to informix-list
sending to informix-list