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originally posted by ronnie:


Following is the Extents Storage Parameter for each one of them. (I am using DBA Studio to look at them)

Initial Size = 256 KB
Next Size = 256 KB
Optimal Size = 512 KB
Minimum Number = 2 (not editable)
Maximum Number = 2147483645


The RBS Tablespace has the following Extent Storage paramater

Initial Size = 1024 KB
Next Size = 1024 KB
Minimum Number = 2 (editable)
Maximum Number = 2147483645
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Your RBS Tablespace storage parameter will only take effect
to your rollback segments storage definition if you did not explicitly define the storage parameter of your rbs.
Let's say:
create public rollback segment rbs1 tablespace RBS;
rbs1 will have automatic storage def of:
initial size 1024 kb
next size 1024 kb
mininum extents 2
maximum extents 2147483645

Though it could perform much better, but I believe it's still not enough. So you have to make it much bigger, follow what tamilselvan says about number minimum and maximum extents and if you have a lot of concurrent users that makes a lot of DMLs to your system which leads to exhaust your rbs then you have to add more numbers of rbs.