Extra high memory consumption when _M_CACHE_OPTS is on

[Alexander Shibalovsky]

Hi everyone! Can you help me with the following issue: an ia64 system running under hp-ux 11.23 experiences a constantly increasing memory consumption when using a thread local cache with every legal setting (starting from _M_CACHE_OPTS = 1:8:0 and higher). Server has 12Gb of RAM and the size of the multi-threaded process increases by 1-3Mb/sec until it reaches the bound set by maxdsiz_64. These memory "leaks" disappear when I turn off (or unset) the _M_CACHE_OPTS parameter. Unforunately, the usage of this parameter increases the productivity by 200-300%, so I'd like to keep it on if possible ;-)

[Dennis Handly]

It is still occurring? Have you looked into patches?

[whiteknight · Accepted solution]

Alex,

PHCO_36673 11.23 libc cumulative patch has addressed this issue.


WK
please assign points

[Steven E. Protter]

Shalom,

You might want to look for a memory leak.

http://www.hpuxconsulting.com/mem.mon

I just got a bug report on the HP-UX with filter version, but without the -f parameter it should track your top memory users over time and identify processes that are gaining memory and not playing nice and giving it back.

SEP

[Alexander Shibalovsky]

whiteknight is absolutely right, PHCO_35744: ABORT HANG MEMORY_LEAK addresses this issue and is included in cumulative patch PHCO_36673;

Thank you for your help, I'll close the thread now.

[Alexander Shibalovsky]

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