> The theshold for using PAE is actually far lower than 4GB. 4GB is the > total memory address space -- split that in half for 2GB for userspace, > 2GB for kernel. The OS cache resides in kernel space -- after you take > alway the memory allocation for devices, you're left with a window of > roughly 900MB.
I set shammax = [EMAIL PROTECTED] /]# cat < /proc/sys/kernel/shmmax 4000000000 shmall = [EMAIL PROTECTED] /]# cat < /proc/sys/kernel/shmall 134217728 Is that ok for 4 Gb. mechine? > Since the optimal state is to allocate a small amount of memory to > Postgres and leave a huge chunk to the OS cache, this means you are > already hitting the PAE penalty at 1.5GB of memory. > How could I chang this hitting? Thanks Amrit Thailand ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
