Quoth [EMAIL PROTECTED] (Ruben Rubio): > Hi, I have a question with shared_buffer. > > Ok, I have a server with 4GB of RAM > ----- > # cat /proc/meminfo > MemTotal: 4086484 kB > [...] > ----- > > So, if I want to, for example, shared_buffer to take 3 GB of RAM then > shared_buffer would be 393216 (3 * 1024 * 1024 / 8) > > Postmaster dont start. > Error: FATAL: shmat(id=360448) failed: Invalid argument > > > I can set a less value, but not higher than 3 GB. > > Am I doing something wrong? > Any idea?
Yes, you're trying to set the value way too high. The "rule of thumb" is to set shared buffers to the lesser of 10000 and 15% of system memory. In your case, that would be the lesser of 10000 and 78643, which is 10000. I'm not aware of any actual evidence having emerged that it is of any value to set shared buffers higher than 10000. -- let name="cbbrowne" and tld="acm.org" in name ^ "@" ^ tld;; http://linuxdatabases.info/info/x.html Rules of the Evil Overlord #25. "No matter how well it would perform, I will never construct any sort of machinery which is completely indestructible except for one small and virtually inaccessible vulnerable spot." <http://www.eviloverlord.com/> ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
