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Re: Experimental ARC implementation

From: Jan Wieck <JanWieck(at)Yahoo(dot)com>
To: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Experimental ARC implementation
Date: 2003-11-04 14:14:58
Message-ID: 3FA7B462.7070709@Yahoo.com (view raw or flat)
Thread:
Lists: pgsql-hackers
Jan Wieck wrote:
> Jan Wieck wrote:
> 
>> I will follow up shortly with an approach that integrates Tom's delay 
>> mechanism plus my first READ_BY_VACUUM hack into one combined experiement.
> 
> Okay,
> 
> the attached patch contains the 3 already discussed and one additional 
> change. 

Ooopsy

the B1/B2 queue length adjustment in that one was totally nonsense. This 
one behaves much better.

I added a DEBUG1 elog every 10 seconds to monitor the cache hitrates and 
cache size adjustments. It's pretty neat to watch how it responds to 
running an OLTP kind of thing and then issue VACUUM and run big 
reporting sequential suckers in parallel.


Jan

-- 
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Subject: Re: 7.4RC1 tag'd, branched and bundled ...
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Subject: Re: Experimental patch for inter-page delay in VACUUM

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