Обсуждение: Maxium Share Memory in Debian 64bit
| Hello All Could you please help to figure out how much maxium memory can allocated in Shared Memory on Debian 64 bit OS ? Thx Prashant |
On 02/24/12 11:41 AM, Prashant Bharucha wrote: > Hello All > > Could you please help to figure out how much maxium memory can > allocated in Shared Memory on Debian 64 bit OS ? > I rarely set shared_buffers over about 2GB even on machines with 48GB or more ram. its a case of diminishing returns, and leaving that extra memory available for OS file system caching (as well as non-shared things like work_mem, maintenance_work_mem) is usually the better choice. -- john r pierce N 37, W 122 santa cruz ca mid-left coast
On Fri, Feb 24, 2012 at 12:41 PM, Prashant Bharucha <prashantbharucha@yahoo.ca> wrote: > > Hello All > > Could you please help to figure out how much maxium memory can allocated in Shared Memory on Debian 64 bit OS ? With appropriate shm settings, you can easily set it high enough to cause problems with swapping etc. I've successfully allocated 24G in testing on a machiine with 128G. However, in all the testing I did 8G was the point where we no longer got any performance increase.