Re: Determine current running query,

On Tue, 2005-03-29 at 09:50, Adam Witney wrote:
> On 29/3/05 4:27 pm, "Tom Lane" <tgl@sss.pgh.pa.us> wrote:
>
> > Adam Witney <awitney@sghms.ac.uk> writes:
> >> Shouldn't there be something in current_query?
> >
> > Only if (a) you have stats_command_string turned on, *and* (b) you
> > are a superuser or the owner of the target process.
>
> I am logged in as the superuser, and I just switched stats_command_string
> on. Table now looks like this
>
> bugasbase=# SELECT * from pg_stat_activity ;
>   datid   |  datname  | procpid | usesysid | usename | current_query |
> query_start
> ----------+-----------+---------+----------+---------+---------------+------
> --------------------------
>  80573819 | bugasbase |   23197 |        1 | pgsql   | <IDLE>        |
> 29/03/2005 17:03:25.911288 BST
>  80573819 | bugasbase |   23195 |      109 | lubrook |               |
>
> I did find a reference on google to the fact that there was/is a max query
> size length for this? I think this was for 7.3.5, is this still the case?
> Maybe this is the reason it is not showing up (it is quite a large query
> string)?

You might want to post your reference.  There hasn't been a built-in
query length limit for quite some time now.  MySQL's benchmark, by the
way, erroneously listed postgresql as having a 16 meg max query size
because (tada!) they had a 16 meg buffer allocated in their benchmark
and when it filled up and errored out the size was 16 meg.  I don't
believe this was ever fixed, either in their code or in the report they
had for a very long time on their web site.  And it was pointed out
again and again, by me.