In looking at top, I have noticed when doing some
long queries that RAM memory is only being used
at 1-3%. While, CPU often jumps to 97, 98, even
99% utilization (which is great!).

Is this normal for RAM utilization?

If not, how can I better utilize my RAM during
queries and or general processing?

Thanks for your help!
Lynn Tilby
ltilby@asu.edu

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Lynn.Tilby@asu.edu writes:
[color=blue]
> In looking at top, I have noticed when doing some
> long queries that RAM memory is only being used
> at 1-3%. While, CPU often jumps to 97, 98, even
> 99% utilization (which is great!).
>
> Is this normal for RAM utilization?[/color]

It depends on what you have set shared_buffers to in your
postgresql.conf file. If you have not tuned this value yet you should
do so as the default setting is very conservative.

There is a lot of discussion on appropriate shared_buffers settings if
you search the mailing list archives...

-Doug

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TIP 9: the planner will ignore your desire to choose an index scan if your
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Doug,

Thanks... Looks like I need to do some tuning!
Lynn

Quoting Doug McNaught <doug@mcnaught.org>:
[color=blue]
> Lynn.Tilby@asu.edu writes:
>[color=green]
> > In looking at top, I have noticed when doing some
> > long queries that RAM memory is only being used
> > at 1-3%. While, CPU often jumps to 97, 98, even
> > 99% utilization (which is great!).
> >
> > Is this normal for RAM utilization?[/color]
>
> It depends on what you have set shared_buffers to in your
> postgresql.conf file. If you have not tuned this value yet you should
> do so as the default setting is very conservative.
>
> There is a lot of discussion on appropriate shared_buffers settings if
> you search the mailing list archives...
>
> -Doug
>[/color]


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TIP 7: don't forget to increase your free space map settings

Doug,

Thanks... Looks like I need to do some tuning!
Lynn

Quoting Doug McNaught <doug@mcnaught.org>:
[color=blue]
> Lynn.Tilby@asu.edu writes:
>[color=green]
> > In looking at top, I have noticed when doing some
> > long queries that RAM memory is only being used
> > at 1-3%. While, CPU often jumps to 97, 98, even
> > 99% utilization (which is great!).
> >
> > Is this normal for RAM utilization?[/color]
>
> It depends on what you have set shared_buffers to in your
> postgresql.conf file. If you have not tuned this value yet you should
> do so as the default setting is very conservative.
>
> There is a lot of discussion on appropriate shared_buffers settings if
> you search the mailing list archives...
>
> -Doug
>[/color]


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TIP 7: don't forget to increase your free space map settings