Re: simple update queries take a long time - postgres 8.3.1

[mark <markkicks(at)gmail(dot)com>]

On Mon, Mar 31, 2008 at 12:48 PM, Raymond O'Donnell <rod(at)iol(dot)ie> wrote:

On 31/03/2008 20:38, mark wrote:

> EXPLAIN ANALYZE update users set number_recieved=number_recieved+1 where
> uid=738889333;
>                                                     QUERY PLAN
> ------------------------------------------------------------------------------------------------------------------
>  Index Scan using idx_uid on users  (cost=0.00..8.46 rows=1 width=1073)
> (actual time=0.094..0.161 rows=1 loops=1)
>    Index Cond: (uid = 738889333)
>  Total runtime: 11479.053 ms

Is there anything going on that might affect the time taken? - triggers,
loads of indices to be updated, etc? From the docs[1]:

no, there are no triggers at all.. just the index on the column..
can you explain what the numbers mean in the EXPLAIN ANALYZE?

(cost=0.00..8.46 rows=1 width=1073)  (actual time=0.094..0.161 rows=1 loops=1)
thanks