diff options
Diffstat (limited to 'src/backend/storage/buffer/bufmgr.c')
| -rw-r--r-- | src/backend/storage/buffer/bufmgr.c | 72 |
1 files changed, 1 insertions, 71 deletions
diff --git a/src/backend/storage/buffer/bufmgr.c b/src/backend/storage/buffer/bufmgr.c index 4f6772564a8..f718e33cd59 100644 --- a/src/backend/storage/buffer/bufmgr.c +++ b/src/backend/storage/buffer/bufmgr.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.165 2004/05/08 19:09:25 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.166 2004/05/29 22:48:19 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -60,10 +60,6 @@ bool zero_damaged_pages = false; bool ShowPinTrace = false; #endif -int BgWriterDelay = 200; -int BgWriterPercent = 1; -int BgWriterMaxpages = 100; - long NDirectFileRead; /* some I/O's are direct file access. * bypass bufmgr */ long NDirectFileWrite; /* e.g., I/O in psort and hashjoin. */ @@ -863,72 +859,6 @@ FlushBufferPool(void) /* - * BufferBackgroundWriter - * - * Periodically flushes dirty blocks from the buffer pool to keep - * the LRU list clean, preventing regular backends from writing. - */ -void -BufferBackgroundWriter(void) -{ - if (BgWriterPercent == 0) - return; - - /* - * Loop forever - */ - for (;;) - { - int n; - long udelay; - - /* - * Call BufferSync() with instructions to keep just the - * LRU heads clean. - */ - n = BufferSync(BgWriterPercent, BgWriterMaxpages); - - /* - * Whatever signal is sent to us, let's just die gallantly. If - * it wasn't meant that way, the postmaster will reincarnate us. - */ - if (InterruptPending) - return; - - /* - * Whenever we have nothing to do, close all smgr files. This - * is so we won't hang onto smgr references to deleted files - * indefinitely. XXX this is a bogus, temporary solution. 'Twould - * be much better to do this once per checkpoint, but the bgwriter - * doesn't yet know anything about checkpoints. - */ - if (n == 0) - smgrcloseall(); - - /* - * Nap for the configured time or sleep for 10 seconds if - * there was nothing to do at all. - * - * On some platforms, signals won't interrupt the sleep. To ensure - * we respond reasonably promptly when the postmaster signals us, - * break down the sleep into 1-second increments, and check for - * interrupts after each nap. - */ - udelay = ((n > 0) ? BgWriterDelay : 10000) * 1000L; - while (udelay > 1000000L) - { - pg_usleep(1000000L); - udelay -= 1000000L; - if (InterruptPending) - return; - } - pg_usleep(udelay); - if (InterruptPending) - return; - } -} - -/* * Do whatever is needed to prepare for commit at the bufmgr and smgr levels */ void |