As most everyone has said so far .... Its all subjective. What is large to
me .... is a dinky little thing to someone else.
Right now at my current job we have around 37 instances on 4 mchines with 2
GB or less of memory and 2 - 4 processors each. These DBs range from a 10
MB to a 70 MB SGA (yes, sounded real small to me when I got here also).
These databases are all in the realm of 60 - 100 GB of data each.
My last job we had 2 machines running 4 instances. These DBs had SGAs from
350 MB to 980 MB in size with 4 CPUs using 4 GB of memory. As far as size
goes, we had upwards of a Terrabyte of data.
To me, I have found that I have to treat both setups the same. They really
do have the same problems (space, hit rates, drive failures, hardware
failures, etc.) You just have to pay closer attention to certain aspects of
them differently. With the small SGAs we have to look real close at hit
rates and all the Memory Dependent aspects of the DB. With the large amount
of data on the other DB we had to look more closely at Data and file related
problems.
All I am trying to say is ......... its all subjective.
Kevin
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Author: Kevin Lange
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