All,
I am looking to automate analyze table in my application.
I have some insert only tables in my application which I need to analyze as
data grows.
Since the inserts are application controlled, I can choose to run analyze when
I determine the
data has grown more than x% since last
Saksena [EMAIL PROTECTED]
Cc: pgsql-performance@postgresql.org
Sent: Friday, February 09, 2007 4:45 PM
Subject: Re: [PERFORM] Is there an equivalent for Oracle's
user_tables.num_rows
Virag Saksena [EMAIL PROTECTED] writes:
Does someone know of a way of telling what the optimizer believes
Hi,
I have query where I do two
inline queries (which involves grouping) and then join them with an outer
join.
The individual queries run in 50-300 ms. However
the optimizer is choosing a nested loop to join them rather than a Hash
join
causing the complete query to take 500+ seconds. It
=
outer.childaddr))
Total runtime: 9950.192 ms
Regards,
Virag
- Original Message -
From: Tom Lane [EMAIL PROTECTED]
To: Virag Saksena [EMAIL PROTECTED]
Cc: pgsql-performance@postgresql.org
Sent: Monday, February 20, 2006 9:35 PM
Subject: Re: [PERFORM] Cost Issue - How do I force a Hash Join
DISTINCT values. The idea of DISTINCTing by both columns
is to make sure the planner finds the index. (lately I had a similar
problem: WHERE a=1 ORDER BY b LIMIT 1 used an index on b, instead of an
(a,b) index. Using ORDER BY a,b solved it) HTH,
-- G. On 2006.01.04. 5:12, Virag
Saksena
I have a table which stores cumulative valuesI
would like to display/chart the deltas between successive data
collections
If my primary key only increments by 1, I could
write a simple query
select b.gc_minor - a.gc_minor, b.gc_major -
a.gc_major from jam_trace_sys a, jam_trace_sys bwhere
Hi,
I am trying to use Explain Analyze to trace a slow SQL statement called from
JDBC.
The SQL statement with the parameters taked 11 seconds. When I run a explain
analyze from psql, it takes 50 ms with a reasonable explain plan. However
when I try to run an explain analyze from JDBC with the
