Better Unilization of Memory

[Lynn.Tilby]

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
lt****@asu.edu

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[Doug McNaught]

Ly********@asu.edu writes:

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?

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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[Lynn.Tilby]

Doug,

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

Quoting Doug McNaught <do**@mcnaught.org>:

Ly********@asu.edu writes:

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?

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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[Lynn.Tilby]

Doug,

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

Quoting Doug McNaught <do**@mcnaught.org>:

Ly********@asu.edu writes:

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?

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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