2011/12/31 Igor <ischt...@gmail.com>: > Hi Pavel, > > Thanks for your reply. > > My understanding is that Explain provides measurements of query run time but > does not include or specifies the timing for planning and for running > optimization algorithms.
the a result of explain is visualisation of execution plan - so all necessary steps (parsing, analysing, optimization) was processed. So time of EXPLAIN is time that you looking. Other similar value should by time of PREPARE statement. Regards Pavel > > Pls let me know if my understanding is not correct. In that case, how do I > find out how much of query time is spent to prepare the query and how much > time is spent executing it. > > Thanks, > James > > On Dec 27, 2011, at 1:38 AM, Pavel Stehule <pavel.steh...@gmail.com> wrote: > >> Hello >> >> 2011/12/23 Igor Schtein <ischt...@gmail.com>: >>> I'd like to find some measurements/figures of query preparation and planning >>> time to justify the use of prepared statements and stored procedures. >>> I know that complex queries have larger preparation time. Though, is it >>> possible to explicitly measure the time the optimizer spends parsing and >>> planning for query execution? >> >> You can use time for EXPLAIN statement >> >> Regards >> >> Pavel Stehule >> >>> >>> Thank you, >>> James -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
