Hi,

thanks for the help.

Anandkl, yep, that was pretty much my understanding.

Davey, unfortunately I can't access the syslog.

After the system consumed all the swap space yesterday(eek), the sysadmin guys added more swap space, but knowing this would not cure the performance issue, I dropped the SGA on datbase 1 by 1Gb, and now databases 2 & 3 are noticeably quicker. No doubt due to the fact the SGA's are no longer running off the swap space. Database1 is also fine, the sga was seemingly oversized.

But back to my original question, if Grid reports back 8Gb of memory, and the sysadmin guys swear the box has 8Gb of RAM, why do I see in top this figure of 5.7Gb of 'real' memory?

Is top accurate?

Bazza