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Re: Uptimes - any guidance?



In <[🔎] 20090626193651.GA22396@cyrax.ece.utexas.edu>, Kumar Appaiah wrote:
>But I have seen some
>people reboot at regular intervals, since they feel it "flushes the
>memory" and keeps performance good, though I don't really believe that
>and can't comment on the veracity of those statements. :-)

They are almost certainly hurting their total throughput.  First, with the 
downtime of the reboot.  Second, with the having to repopulate file system 
cache from disk.

It is a fairly sure way to release space claimed by "ghost" files back to 
the file system and memory claimed by persistent shared memory pools back to 
RAM/swap, but both of those can often be handled without a reboot.
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