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memory problem with Sybase after ios upgrade

ernest tamura
Occasional Advisor

memory problem with Sybase after ios upgrade

I recently installed hpux 11.0 on a K370 server. The server previously ran 10.20. We are running Sybase 11.92. When Sybase starts up now an error appears:

kernel Locking shared memory into physical memory.
kernel os_create_region: can't allocate 777211904 bytes.
kernel kbcreate: couldn't create kernel region.
kernel kistartup: could not create share.

unlockable memory set to 0.

Any ideas???
Respected Contributor

Re: memory problem with Sybase after ios upgrade


1.You can try to install all the required patches on HP-UX using custom patch manager.

2. try to set the parammeter maxdziz to max value that is
0x7b03A000 (2 GB)

Hope this helps ,

"Winners don't do different things , they do things differently"
steven Burgess_2
Honored Contributor

Re: memory problem with Sybase after ios upgrade

Hi ernest

Check glance to see memory usage

swapinfo -tam to check swapinfo

Have a look at the following link regarding unlockable_mem parameter,,0xc6fb5e938a10d6118ff40090279cd0f9,00.html


Whats your buffer cache set to

sysdef | grep nbuf
sysdef | grep bufpages

You can allow the system to use dynamic buffer caching by setting them both to 0 then manage them through the settings


general advise is to set them to 5 and 15

This will be a percentage value of your systems memory

Also have a look at the following regarding other tunable parameters



take your time and think things through
Guido Schneider
Occasional Visitor

Re: memory problem with Sybase after ios upgrade

Hi ernest,
it seems that your configured shared memory
shmmax is to small and sybase is not able to allocate the total memory configured in SERVERNAME.cfg