Messages in this thread | | | Date | Wed, 30 Jun 1999 18:25:39 -0400 | From | (Bret Orsburn) | Subject | Re: Large Shared Memory |
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Matti Aarnio wrote: > > On Wed, Jun 30, 1999 at 12:48:52PM -0400, Bret Orsburn wrote: > > Worthies of the Linux Kernel List: > > > > I need to create a rather large region of shared memory -- on the order of 50MB. > > More specifically, I need a contiguous region of memory that can be mapped into > > multiple processes (serially, not simultaneously) on a uniprocessor system and > > persist beyond any particular process. > > > > It appears that there is a limit on System V style shared memory segments of > > about 4MB, so that method is out. > > (This is a FAQ with e.g. Oracle setup at Linux..) > > Size of the SysV SHM is runtime controlled by writing to: > /proc/sys/kernel/shmmax > > # echo "55000000" > /proc/sys/kernel/shmmax > > Now your maximum SHM size is 55 million bytes (you get the idea ?) > > There are some limits at how high you can push that, but they > are pretty high... At least 512 MB is possible at SysV SHM.
Wow! That's great news. I'll give it a try.
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Bret Orsburn borsburn@codonics.com
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