Horton

Re: [v9.1] sepgsql - userspace access vector cache

Yeb Havinga <yebhavinga@gmail.com>

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From: Yeb Havinga <yebhavinga@gmail.com>
To: Kohei Kaigai <Kohei.Kaigai@EMEA.NEC.COM>
Cc: Robert Haas <robertmhaas@gmail.com>, PgHacker <pgsql-hackers@postgresql.org>, Kohei KaiGai <kaigai@kaigai.gr.jp>
Date: 2011-07-22T10:11:52Z
Lists: pgsql-hackers

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  1. Remove the limit on the number of entries allowed in catcaches, and

On 2011-07-22 11:55, Kohei Kaigai wrote:
>
>> 2) Also I thought if it could work to not remember tcontext is valid, but instead remember the consequence,
>> which is that it is replaced by "unlabeled". It makes the avc_cache struct shorter and the code somewhat
>> simpler.
>>
> Here is a reason why we hold tcontext, even if it is not valid.
> The hash key of avc_cache is combination of scontext, tcontext and tclass. Thus, if we replaced an invalid
> tcontext by unlabeled context, it would always make cache mishit and performance loss.
I see that now, thanks.

I have no further comments, and I think that the patch in it's current 
status is ready for committer.

regards,
-- 

Yeb Havinga
http://www.mgrid.net/
Mastering Medical Data