Thank you very much. I didn't know that. I set my shmmax to 4000000000 but you're right, we will see to use a 64 bits system ;)
Le vendredi 03 avril 2009 à 12:37 +0200, Thomas Markus a écrit : > hi, > > i assume you have a 32bit system so you cant set shmmax to 4gb. as a > side effect your value 4294967296 in a binary 32bit representation is > exactly 0. look for previous threads about shmmax. and use a 64bit system :) > > regards > thomas > > Nicolas Michel schrieb: > > Hi here, > > > > Our server had 2GB of RAM. We added some memory to have 16GB. We are > > on a debian etch. I installed the "bigmem" kernel to use the all memory : > > > > ~# cat /proc/meminfo > > MemTotal: 16573232 kB > > MemFree: 15448836 kB > > Buffers: 133772 kB > > Cached: 445388 kB > > SwapCached: 0 kB > > Active: 782764 kB > > Inactive: 302760 kB > > HighTotal: 15794120 kB > > HighFree: 14838384 kB > > LowTotal: 779112 kB > > LowFree: 610452 kB > > SwapTotal: 2658716 kB > > SwapFree: 2658716 kB > > Dirty: 452 kB > > Writeback: 4 kB > > AnonPages: 506336 kB > > Mapped: 126524 kB > > Slab: 27620 kB > > PageTables: 3036 kB > > NFS_Unstable: 0 kB > > Bounce: 0 kB > > CommitLimit: 10945332 kB > > Committed_AS: 2187952 kB > > VmallocTotal: 118776 kB > > VmallocUsed: 3716 kB > > VmallocChunk: 114640 kB > > > > > > I wanted to give to postgres 4GB. So I tryied to set shmmax to 4Go : > > > > sysctl kernel.shmmax=4294967296 > > > > > > But it doesn't work : if I launch after this modification this command : > > > > sysctl kernel.shmmax > > > > it gives me this response : > > > > kernel.shmmax = 0 > > > > Why? Is there a limit to shmmax? > >
