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Re: update i386 spinlock for hyperthreading

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Manfred Spraul <manfred(at)colorfullife(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>,PostgreSQL-patches <pgsql-patches(at)postgresql(dot)org>, markw(at)osdl(dot)org
Subject: Re: update i386 spinlock for hyperthreading
Date: 2003-12-30 03:37:45
Message-ID: 200312300337.hBU3bjP01804@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-generalpgsql-hackerspgsql-patches
Manfred Spraul wrote:
> The scary part from the system perspective are the 35 million context 
> switches that were generated by the BufMgrLock and the LockMgrLock. I 
> remember there were patches that tried other algorithms instead of the 
> simple LRU for the buffer manager. Has anyone tried to change the 
> locking of the buffer manager?

CVS HEAD already has an Adaptive Replacement Cache (ARC) for buffer
replacement.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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