Scott Marlowe wrote:
On Wed, 2005-05-18 at 08:35, Pallav Kalva wrote:
Hi Everybody,
I am having problems with logging long running SQL in the log file.
I have set log_min_duration_statement = 5000 (5secs) and it is not
logging sql statements that took over 5 secs and this is only from
queries generated by Hibernate . here is a sample query from hibernate :
-----------------------------------------------------------------------------------------
select listingadd1_.addressid as col_0_0_
from listing.listing listing0_, listing.address listingadd1_
where ((select count(taxrolls2_.fkaddressid)
from listing.taxroll taxrolls2_
where listingadd1_.addressid=taxrolls2_.fkaddressid)=0 )
and(listing0_.fkbestaddressid=listingadd1_.addressid )
and(listing0_.entrydate>$1 )
order by listingadd1_.addressid asc
--------------------------------------------------------------------------------------------
This above query take more than 5 secs to run and it wont get logged ,
where as all other queries which are not generated by Hibernate are
logged. Is this expected behavior ? am I missing something else ?
Please advice.
Are you sure it's taking more than 5 seconds to run, not that it's
taking <5 seconds to run and >5 seconds to return the data. I'm pretty
sure the time it takes to ship out the data isn't counted in the time
used to decide whether to log the query or not by the postmaster.
I.e. what does explain analyze QUERY HERE say about the execution time?
Hi Scott,
Thanks! for the reply. The query for sure runs for more than 5
secs, I passed the same value again and ran the query in the psql with
explain analyze .
Here is the explain analyze output :
explain analyze
select listingadd1_.addressid as col_0_0_
from listing.listing listing0_, listing.address listingadd1_
where ((select count(taxrolls2_.fkaddressid)
from listing.taxroll taxrolls2_
where listingadd1_.addressid=taxrolls2_.fkaddressid)=0 )
and(listing0_.fkbestaddressid=listingadd1_.addressid )
and(listing0_.entrydate>'2004-12-15' )
order by listingadd1_.addressid asc;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sort (cost=17503528.41..17503530.10 rows=678 width=4) (actual
time=37279.353..37750.532 rows=398459 loops=1)
Sort Key: listingadd1_.addressid
-> Nested Loop (cost=0.00..17503496.52 rows=678 width=4) (actual
time=5.185..31575.629 rows=398459 loops=1)
-> Seq Scan on listing listing0_ (cost=0.00..10312.25
rows=135580 width=4) (actual time=4.885..1834.806 rows=406740 loops=1)
Filter: (entrydate > '2004-12-15 00:00:00'::timestamp
without time zone)
-> Index Scan using pk_address_addressid on address
listingadd1_ (cost=0.00..129.01 rows=1 width=4) (actual
time=0.065..0.067 rows=1 loops=406740)
Index Cond: ("outer".fkbestaddressid =
listingadd1_.addressid)
Filter: ((subplan) = 0)
SubPlan
-> Aggregate (cost=123.00..123.00 rows=1 width=4)
(actual time=0.015..0.016 rows=1 loops=406740)
-> Index Scan using idx_taxroll_fkaddressid on
taxroll taxrolls2_ (cost=0.00..122.89 rows=42 width=4) (actual
time=0.009..0.009 rows=0 loops=406740)
Index Cond: ($0 = fkaddressid)
Total runtime: 38026.606 ms
(13 rows)
