Query regarding kernel.shmall value in RHEL 5 (x86

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Query regarding kernel.shmall value in RHEL 5 (x86_64)

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04-07-2008, 09:35 AM	#1
mether Member Registered: Mar 2007 Distribution: RHEL, Fedora, Open Suse Posts: 151 Rep:	Query regarding kernel.shmall value in RHEL 5 (x86_64) Hello all, The default value of kernel.shmall in RHEL5 (x86_64) machine is "4294967296" which I believe is in pages. I have checked in my RHEL4 64bit machine and the shmall value is 2097152 which I believe is the default value in other RHEL versions also. In RHEL5 64bit the default value is 42949672964096 = 17592186044416 bytes, which is around 16TB. Please correct me if my calculation is wrong here. Please tell me if the default value 4294967296* in RHEL5(x86_64) is the correct one or not? If yes, why this has been set to such a big value?

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