Oracle Audio Technologies B31679-01 manual Increase number of semaphores

ryps3# modload /kernel/sys/semsys ryps3# modload /kernel/sys/shmsys

Increase number of semaphores

For Solaris 10 systems, the default semaphore settings should be sufficient without entries in /etc/system.

On other Solaris systems, you may need to increase the number of semaphores. TimesTen consumes 1 SEMMNI per active data store, plus one additional SEMMNI per TimesTen instance where Client/Server communication is done through shared memory.

For each data store, TimesTen consumes 100 SEMMSL if the Connections attribute is set to the default value (64), and one additional SEMMSL for each estimated connection above the default. We recommend that you increase the number of semaphores:

1.Log in as user root.

2.Set or add the following lines to /etc/system:

set semsys:seminfo_semmni = 20 set semsys:seminfo_semmsl = 512 set semsys:seminfo_semmns = 2000 set semsys:seminfo_semmnu = 2000

Note: The values in this step are the minimum number of required semaphores. You can increase these numbers as needed. You can use the following formula as a guide, although in practice, SEMMNS and SEMMNU can be much less than SEMMNI * SEMMSL because not every program in the system needs semaphores.

SEMMNS=SEMMNU = (SEMMNI * SEMMSL).

3.Reboot your system.

4.To view the current limits, use:

Shared memory IPC client connections

% /usr/sbin/sysdef

This command displays the limits for SEMMSL, SEMMNS, SEMOPM, and SEMMNI, respectively.

SEMOPM is the maximum number of operations per semop call. It does not need to be reset.

On Solaris, to have more than 6 ShmIpc-enabled Client DSN connections per process, you must make changes to the SHMSEG kernel parameter.

To access more than 6 data stores, you must make changes to the SHMSEG kernel parameter. For example, to allow a single process to

TimesTen Installation 31