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Re: Large number of tables slow insert

From: dforum <dforums(at)vieonet(dot)com>
To: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
Cc: Loic Petit <tls(dot)wydd(at)free(dot)fr>, max(at)nts(dot)biz(dot)ua, pgsql-performance(at)postgresql(dot)org
Subject: Re: Large number of tables slow insert
Date: 2008-08-24 14:31:14
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
hello to all,

I've a question regarding the folowing comments.

How to estimate vacuum aggressiveness ?

It's for me very deficulte to setup the autovaccum setting correctly. It 
seems for me that it is not enough aggressive, but when I change the 
settings the autovacuum process is almost always running.

So how to setup it, for around 40000 insert, update, delete per 5 minutes


Scott Marlowe a écrit :
> On Sat, Aug 23, 2008 at 6:59 PM, Loic Petit <tls(dot)wydd(at)free(dot)fr> wrote:
>> 1 table contains about 5 indexes : timestamp, one for each sensor type - 3,
>> and one for packet counting (measures packet dropping)
>> (I reckon that this is quite heavy, but a least the timestamp and the values
>> are really usefull)
> But what's the update rate on these indexes and tables?  I'm wondering
> if you're not vacuuming aggresively enough to keep up with bursty
> update patterns

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