Configuration Parameter File Reference
Maximum size of shared memory for locks.
Size (in bytes) of memory allocated for locks. The system rounds up the value to the next multiple of 64 kilobytes. The default is 16777216 bytes. (On the IBM AIX and HP-UX platforms, the default is 33554432 bytes.) The range is 65536 bytes up to the gmheap
size. If you need more room for the lock table, increase the gmheap
parameter as well. If you edit this setting, changes will take effect immediately.
Range of Values
65536 bytes up to the size of gmheap
. Since memory used to allocate locks is taken from gmheap
(the Generic Memory Heap), you cannot use more memory for locks than exists in gmheap
. Memory from gmheap
is also used for NLS tables and the PID table. If you increase the size of locksiz
, increase the size of gmheap
On all platforms, except for HPUX, the default amount of memory allocated for locks (the maximum size of the lock table) is 1179648 bytes. On the HPUX platform, the default amount of memory allocated for locks is four times the default on other platforms; that is 4 * 1179648 (4718592) bytes.