Re: query optimization

[Julius Tuskenis <julius(at)nsoft(dot)lt>]

Please send the "explain analyze YOUR_QUERY" output after first run and 
later. Also please mention platform and pg version you are using.


Suresh Borse rašė:
> Good Afternoon !!!
>
> The view executes very faster for the first time.
>
> When I execute the view again and again suddenly it gets slow or it 
> gets hang.
>
> I have also traced the query plan but it changes for each 
> execution.Can we fix the query plan.
>
> I have also tested the view on my test machine but the result was same.
>
> The view contains multi-table joins.
>
> Warm Regards,
> Suresh Borse
>
>
>
> On Thu, 2008-07-10 at 12:25 +0300, Julius Tuskenis wrote:
> > Hello, Suresh
> >
> > Maybe its taking long for the first time, and then its faster? Did you 
> > noticed any circumstances under witch your query takes longer to execute?
> >
> >
> > Suresh Borse rašė:
> > > Dear All,
> > >
> > > I am facing very strange problem in postgres while executing the view.
> > >
> > > When I execute the view some times it takes few milliseconds, 
> > > sometimes it take several seconds and some times doesn't execute.
> > >
> > > I tried to troubleshoot using the explain plan method. But explain 
> > > plan also changes for each execution.
> > >
> > > Can anybody help me for troubleshooting  and for resolving the 
> > > performance issue.
> > >
> > >
> > > Thanks & Regards,
> > > Suresh Borse
> > >
> > >
> >
> >
> >     


--
Julius Tuskenis
Programavimo skyriaus vadovas
UAB nSoft
mob. +37068233050