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IDS Forum

Re: onmode -ky hangs

Posted By: Sebastian, Norma J.
Date: Saturday, 21 October 2006, at 10:55 p.m.

In Response To: Re: onmode -ky hangs (FRANK)

Hello Frank,

You are on IDS 10.00.UC5 (32 bit)
Your onstat -g seg showed :

IBM Informix Dynamic Server Version 10.00.UC5 -- On-Line (CKPT REQ)
-- Up 2 days 21:04:56 -- 2008880 Kbytes
Segment Summary:

id key addr size ovhd class
blkused blkfree
7340036 1382041603 30000000 540672 672 M 132 0
9437187 1382041601 40000000 1708425216 269028 R* 417091 5
9437189 1382041602 b0000000 314572800 10248 V 73279 3521

6 1382041604 e0000000 33554432 1672 V 6482 1710

Total: - - 2,057,093,120 - -
496984 5236

I don't know much about AIX other than hearing an Informix DBA say
something about a limit of 11 memory segments which isn't your problem
as shown above you have 4.

Back when we ran 32 bit IDS on 32 bit Solaris, IDS would crash when it
hit the max memory allowed for 32bit app on 32bit o/s. We upgraded to
64bit.

Check this out:

http://publib16.boulder.ibm.com/pseries/en_US/aixprggd/genprogc/ipc_limi
ts.htm

some info from this link:

The limit that is the most confusing is the maximum number of shared
memory segments that can be attached simultaneously per process. For
64-bit processes, the maximum number of shared memory segments is
268435456. For 32-bit processes, the maximum number of shared memory
segments is 11, unless the extended shmat capability is used. For more
information on extending shmat, see Understanding Memory Mapping.
.........
The following tables summarize the shared memory limits on IPC
mechanisms.
Shared Memory 4.3.0 4.3.1 4.3.2 5.1 5.2
Maximum segment size (32-bit) 256 MB 2 GB 2 GB 2 GB 2 GB
Maximum segment size (64-bit) 256 MB 2 GB 2 GB 64 GB 1 TB
Minimum segment size 1 1 1 1 1
Maximum number of shared memory IDs 4096 4096 131072 131072
131072
Maximum number of segments per process (32-bit) 11 11 11
11 11

Good luck,
Norma Jean

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