Date: Thu, 4 Mar 2004 9:53:56 -0500 From: <mikej@rogers.com> To: <stable@freebsd.org> Cc: current@freebsd.org Subject: Semaphore scaling Message-ID: <20040304145356.EWCI144376.web02-imail.rogers.com@localhost>
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I am running an application (Plesk) on a 4.9 system that is eating up all= the semaphores and as a result some processes can=92t run. I have contac= ted the software company, and they asked me to increase the semaphore lim= its in the kernel. However their suggested settings seemed very unproport= ional to me. So my question is, how should I adjust the values, while keeping things i= n proportion? I wish to increase the default semaphore limit of 10 to 20.= Can I simply double the semaphore related values? This is what the support guys suggested: --- # number of semaphore identifiers in the system - default is 10 options SEMMNI=3D256 # other things that have to be set to allow increased semaphores without = destabilizing system options SEMMAP=3D768 # amount of entries in semaphore map options SEMMNU=3D768 # number of undo structures in the system options SEMOPM=3D2560 # max number of operations per semop call options SEMUME=3D256 # max number of undo entries per process # number of semaphores in the system - default is 60 options SEMMNS=3D393216 # max number of semaphores per id - default is 60 options SEMMSL=3D1536 --- Thanks. 1
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