On Mon, 16 Feb 2009, Sam Mason wrote:
On Mon, Feb 16, 2009 at 11:09:59AM -0500, Chris Mayfield wrote:
You can also try something like this:
http://wiki.services.openoffice.org/wiki/Cold-start-simulator
might take too long in your situation of thousands of small queries.
Why is this better tha
On Mon, Feb 16, 2009 at 11:09:59AM -0500, Chris Mayfield wrote:
> >With recent versions of Linux you can flush the system's buffer cache by
> >doing:
> >
> > # echo 3 > /proc/sys/vm/drop_caches
>
> You can also try something like this:
> http://wiki.services.openoffice.org/wiki/Cold-start-simulat
With recent versions of Linux you can flush the system's buffer cache by
doing:
# echo 3 > /proc/sys/vm/drop_caches
You can also try something like this:
http://wiki.services.openoffice.org/wiki/Cold-start-simulator
Shutting down the server and running fillmem has worked for me, but that
mi
On Fri, 13 Feb 2009, Sam Mason wrote:
I was hoping for a function I could call, or maybe some variable I write
to, that would cause the contents to be invalidated.
For most people, just restarting the server is acceptable overhead, which
is why nobody has bothered to write such a thing. It w
On Fri, Feb 13, 2009 at 11:13:36AM -0700, Scott Ribe wrote:
> > I was hoping to run many thousands of small (i.e. 100ms or less) queries
> > and if it takes a couple of seconds to restart the database I'm not
> > going to be able to do this.
>
> Are you forgetting the OS's file system cache? That
> Isn't there anything faster than this?
>
> I was hoping to run many thousands of small (i.e. 100ms or less) queries
> and if it takes a couple of seconds to restart the database I'm not
> going to be able to do this.
Are you forgetting the OS's file system cache? That will also have a huge
effe
[ Sorry Brad, I didn't mean to delete your response! lets try again. ]
On Fri, Feb 13, 2009 at 12:52:21PM -0500, Brad Nicholson wrote:
> On Fri, 2009-02-13 at 17:49 +, Sam Mason wrote:
> > I was doing some performance checks and wondered what the best way to
> > clear out the shared buffers is
On Fri, Feb 13, 2009 at 12:52:21PM -0500, Brad Nicholson wrote:
> On Fri, 2009-02-13 at 17:49 +, Sam Mason wrote:
> > I was doing some performance checks and wondered what the best way to
> > clear out the shared buffers is? With the recent improvements in buffer
> > management it appears a si
On Fri, 2009-02-13 at 17:49 +, Sam Mason wrote:
> Hi,
>
> I was doing some performance checks and wondered what the best way to
> clear out the shared buffers is? With the recent improvements in buffer
> management it appears a simple SELECT * FROM large_table; doesn't help
> here!
>
> I was
Hi,
I was doing some performance checks and wondered what the best way to
clear out the shared buffers is? With the recent improvements in buffer
management it appears a simple SELECT * FROM large_table; doesn't help
here!
I was hoping for a function I could call, or maybe some variable I write
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