Re: ALTER table taking ages...

Rajesh Kumar Mallah wrote:
>
> Greetings!
>
> It takes ages to drop a constraint from one of my tables
> [ table details at the end ] I cannot insert into it also.
>
> I know pg_dump is not running and no other query is accessing the table.
> Can anyone help me debugging this problem? Can anyone explain the
> following entires in pg_locks where relation and database
> are both null.
>
> tradein_clients=# SELECT * from pg_locks where mode='ExclusiveLock' and
> granted is true;
> +----------+----------+-------------+-------+---------------+---------+
> | relation | database | transaction | pid | mode | granted |
> +----------+----------+-------------+-------+---------------+---------+
> | NULL | NULL | 116230313 | 19898 | ExclusiveLock | t |
> | NULL | NULL | 116230309 | 24779 | ExclusiveLock | t |
> | NULL | NULL | 116230267 | 24780 | ExclusiveLock | t |
> | NULL | NULL | 116230303 | 24764 | ExclusiveLock | t |
> | NULL | NULL | 116230302 | 24751 | ExclusiveLock | t |
> | NULL | NULL | 116230308 | 24767 | ExclusiveLock | t |
> | NULL | NULL | 116230274 | 24761 | ExclusiveLock | t |
> | NULL | NULL | 116230306 | 24752 | ExclusiveLock | t |
> | NULL | NULL | 116230312 | 23222 | ExclusiveLock | t |
> | NULL | NULL | 116230290 | 24768 | ExclusiveLock | t |
> | NULL | NULL | 116230292 | 24776 | ExclusiveLock | t |
> | NULL | NULL | 116230297 | 24753 | ExclusiveLock | t |
> | NULL | NULL | 116230295 | 24765 | ExclusiveLock | t |
> | NULL | NULL | 116230152 | 24096 | ExclusiveLock | t |
> | NULL | NULL | 116230311 | 24769 | ExclusiveLock | t |
> | NULL | NULL | 116194826 | 23048 | ExclusiveLock | t |
> | NULL | NULL | 116230307 | 24758 | ExclusiveLock | t |
> +----------+----------+-------------+-------+---------------+---------+
> (17 rows)

May I know how you obtain this kind of output ( biq square around
results ) ?

Regards
Gaetano Mendola