ITAGAKI Takahiro wrote: > Tom Lane <[EMAIL PROTECTED]> wrote: > > > > Here is a small patch to prevent undesired WAL file caching by kernel. > > > posix_fadvise(POSIX_FADV_DONTNEED) attempts to free cached pages and > > > the kernel will discard them in preference to other data caches. > > > > On plenty of platforms, this won't even compile ... > > > Do you mean simply following code? or more pretty way? > > #ifdef POSIX_FADV_DONTNEED > posix_fadvise(openLogFile, 0, 0, POSIX_FADV_DONTNEED); > #endif
Yes, but we probably have to have a configure test to see if posix_fadvise exists too. I will keep this for 8.2. -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (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 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq
