Messages in this thread | | | From | ward@speakeas ... | Date | Thu, 15 Apr 2004 13:47:27 +0000 | Subject | FC2T2 shared memory segments cannot be allocated by DB2 V8.1 |
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I'm running into regular memory related issues with a Fedora Core 2 system which appears to have been properly configured using generous sysctl.conf settings.
The symptoms are that I can create a limited number of connections to unique databases running on this development system and then after about the fifth or sixth I encounter an error indicating a failure to allocate shared memory segments.
Running ipcs -m at the time of the error I can see 8 shared memory segments owned by that userid and 32 total on the system. ipcs -l indicates the settings I've made to sysctl.conf...
------ Shared Memory Limits -------- max number of segments = 4096 max seg size (kbytes) = 1048576 max total shared memory (kbytes) = 8388608 min seg size (bytes) = 1
The database engine indicates this error in its logs as an occurance of a Memory allocation failure.
Unsure if this was related to a similar issue which impacts Oracle I explored various combinations of kernels and patches including support for the patch to add a sysctl capability to control the disable_cap_mlock feature.
Note that after the occurance of a failure I'm experiencing problems with the forking of processes. This was seen in kernel compiles and while halting the system.
Any ideas?
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