Re: Physical Memory Fully Used and Swap is Not Used

From: Howard Latham <>
Date: Tue, 23 Jun 2009 07:56:47 +0100
Message-ID: <>

Believe it or not its a fairly easy move to 64 bit Oracle on Redhat - we had Heaps (HA HA) of problems with memory until we switched.

2009/6/23 Niall Litchfield <>

> actually on Linux all it shows is that the memory is at least adequate, not
> that it is sized perfectly. It could be that oracle is only using say 1g of
> that RAM and all the rest is 'in-use' for caching the linux filesystems. On
> Linux you expect memory to show as all 'in-use' until you start swapping :(.
> So I agree that there isn't memory pressure as far as the o/s is concerned,
> but not that the box is sized perfectly for the workload, we don't have
> enough information for that.
> Niall
> On Tue, Jun 23, 2009 at 7:15 AM, Mathias Magnusson <
>> wrote:
>> Are you trying to tune or to understand memory? There is nothing here that
>> would indicate a problem. If you use all you memory and no swap, then that
>> would be optimal. It shows that your box is sized perfectly and you do not
>> ned to use swap
> --
> Niall Litchfield
> Oracle DBA

Howard A. Latham

Received on Tue Jun 23 2009 - 01:56:47 CDT

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