Neil Conway wrote: > Bruce Momjian <[EMAIL PROTECTED]> writes: > > Is TLB Linux-only? > > Well, the "TLB" is a feature of the CPU, so no. Many modern processors > support large TLB pages in some fashion. > > However, the specific API for using large TLB pages differs between > operating systems. The API I'm planning to implement is the one > provided by recent versions of Linux (2.5.38+). > > I've only looked briefly at enabling the usage of large pages on other > operating systems. On Solaris, we already use large pages (due to > using Intimate Shared Memory). On HPUX, you apparently need call > chattr on the executable for it to use large pages. AFAIK the BSDs > don't support large pages for user-land apps -- if I'm incorrect, let > me know. > > > Why use it and non SysV memory? > > It's faster, at least in theory. I posted these links at the start of > the thread: > > http://lwn.net/Articles/6535/ > http://lwn.net/Articles/10293/ > > > Is it a lot of code? > > I haven't implemented it yet, so I'm not sure. However, I don't think > it will be a lot of code.
OK, personally, I would like to see an actual speedup of PostgreSQL queries before I would apply such a OS-specific, version-specific patch. -- Bruce Momjian | http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073 ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
