Re: swapping?

Sorry, a little OT, but anybody know the equivalent command for Mac OSX?
There doesn't seem to be a vmstat on my system

Thanks

adam

> you can use vmstat to measure swap activity. check the man page for your
> system.
>
> Robert Treat
>
> On Thu, 2002-11-14 at 10:53, Wei Weng wrote:
>> How do you notice that if a system started swapping or not?
>>
>> Thanks
>>
>> On Thu, 2002-11-14 at 09:37, Shridhar Daithankar wrote:
>>> On 14 Nov 2002 at 10:30, Wei Weng wrote:
>>>
>>>> The term had been mentioned often enough on this mailing list. Can
>>>> someone enlighten me with some description or a URL where I can read on?
>>>> And why is it important to postgresql database performace?
>>>
>>> When programs request more memory than available, OS 'swaps' some memory to
>>> special area on disk and make the memory available. To programs, it gives
>>> appearance that nearly infinite memory is available.
>>>
>>> Unfortunately disk are hell slower than RAM and hence swapping slows things
>>> down as it takes much to swap in to disk and swap out of disk. Since OS does
>>> not care which programs get swapped, it is possible that postgresql instance
>>> can get swapped. That slows down effective memory access to knees..
>>>
>>> That's why for good performance, a serve should never swap..
>>>
>>> Bye
>>> Shridhar
>>>
>>> --
>>> Peterson's Admonition: When you think you're going down for the third
time
>>> --
>>> just remember that you may have counted wrong.
>>>
>>>
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>> --
>> Wei Weng
>> Network Software Engineer
>> KenCast Inc.
>>
>>
>>
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>
>
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