Messages in this thread |  | | | From | "Chen, Kenneth W" <> | | Subject | RE: Getting rid of SHMMAX/SHMALL ? | | Date | Thu, 4 Aug 2005 15:49:37 -0700 |
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Andi Kleen wrote on Thursday, August 04, 2005 6:24 AM > I think we should just get rid of the per process limit and keep > the global limit, but make it auto tuning based on available memory. > That is still not very nice because that would likely keep it < available > memory/2, but I suspect databases usually want more than that. So > I would even make it bigger than tmpfs for reasonably big machines. > Let's say > > if (main memory >= 1GB) > maxmem = main memory - main memory/8
This might be too low on large system. We usually stress shm pretty hard for db application and usually use more than 87% of total memory in just one shm segment. So I prefer either no limit or a tunable.
- Ken
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