IDS Forum

RE: onmode -r on AIX?

Posted By: Priest, Darryl
Date: Tuesday, 15 May 2007, at 10:24 a.m.

In Response To: Re: onmode -r on AIX? (Maeve Devine)

I seem to recall seeing this error message when the Informix engine had
not been shut down properly and some shared memory segment(s) was/were
still allocated to the previous instance.

-D

-----Original Message-----
From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of
Maeve Devine
Sent: Tuesday, May 15, 2007 9:26 AM
To: ids@iiug.org
Subject: Re: onmode -r on AIX? [9157]

I don't believe you can set SHMMAX and SHMSEG on AIX, it's supposed to
self-tune. I do know it's limited to 11 or 12 segments per process. To
get
around this I normally just set a high SHMVIRTSIZE so it doesn't need to
be
creating loads of segments. The final error it is giving is the same as
what
happens when during normal usage it hits this limit.

But this isn't normal usage. A brand new instance with nothing in it. I
have
nothing else running on the box. I rarely touch ontape and have this
feeling
there is a parameter or command I'm missing. It is trying to use the
wrong
SHMBASE - 14:27:47 Contiguous shared memory segment allocation failed at

0xd0000000.
Allocation retried at 0xe0000000.

Why won't it use the SHMBASE I've set in the onconfig??

Thanks,
Maeve

"ART KAGEL, BLOOMBERG/ 731 LEXIN" <kagel@bloomberg.net> wrote: Did you
check
that the Kernel parameter SHMSEG and SHMMAX are large enough to
accomodate IDS's shared memory requirements - as suggested in the log
message?

Art S. Kagel

----- Original Message -----
From: Maeve Devine
At: 5/15 5:37:35

Hi All,

IDS 9.40.UC4 on AIX 5.1. I have reports of the same behaviour with IDS
10 but
I havn't tested that myself.

I cannot get a cold restore + logical logs working on AIX. It works on
Solaris.

It is when I choose to restore the logical logs that it fails. Works if
I
don't restore the logs.

To the online.log it reports:

14:27:47 Dynamically allocated new virtual shared memory segment (size
8192KB)
14:27:47 Contiguous shared memory segment allocation failed at
0xd0000000.
Allocation retried at 0xe0000000.
Check SHMBASE is consistent with the value in
$INFORMIXDIR/etc/onconfig.std.
Consider using a different SHMBASE value in your ONCONFIG file.
If shared memory segments are not allocated in increasing address order,

memory block allocation performance may degrade.

14:27:47 Dynamically allocated new virtual shared memory segment (size
8192KB)
14:27:47 shmat: [EMFILE][24]: out of shared memory segments, check
system
SHMSEG

14:27:47 out of virtual shared memory

14:27:47 Assert Warning: ISAM error: An error has occurred during
logical
restore.

My SHMBASE in onconfig and onconfig.std are the same and different to
the one
reported above, namely 0x30000000L. The above value is incorrect. I
tried
making my SHMVIRTSIZE much higher so it doesn't need to add new segments
but
it tried anyway. I adjusted the SHMADD size and that was reflected in
the
error message, so it is reading my onconfig.

My steps are:

1. level 0 archive: ontape -s
2. Back up logical logs: ontape -a
3. Server offline
4. Restore level 0 archive and when prompted my logs: ontape -r

Both logs and archive are written to files on disk rather than a tape
device.

Attached the full log (test.log), the af file and the onconfig (test).
I'm
flummoxed, would appreciate any tips.

Thanks,
Maeve

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Messages In This Thread

• onmode -r on AIX?
  Maeve Devine -- Tuesday, 15 May 2007, at 5:37 a.m.
  • Re: onmode -r on AIX?
    ART KAGEL, BLOOMBERG/ 731 LEXIN -- Tuesday, 15 May 2007, at 8:59 a.m.
    • Re: onmode -r on AIX?
      Maeve Devine -- Tuesday, 15 May 2007, at 9:26 a.m.
      • RE: onmode -r on AIX?
        Priest, Darryl -- Tuesday, 15 May 2007, at 10:24 a.m.
      • Re: onmode -r on AIX?
        Martin Fuerderer -- Tuesday, 15 May 2007, at 11:01 a.m.
        • Re: onmode -r on AIX?
          Maeve Devine -- Tuesday, 15 May 2007, at 11:44 a.m.

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