ORACLE requirement for 8500 TPS

Hi All,
I am designing a Database system in which i have required 8500 TPS limit (Transactions per second) . I want to use HP Blade Server Quad processors with 2.0 GHZ and 4 GB RAM. OS will be RHEL 5.0 . Can any one suggest me how many nodes are required for design this kind of Database.
Thanx
Rajesh Bansal

30 Milli Second(MAX)Is it just a portion (time spent in DB) in total response time or is it end-user time? What kind of client(s) will you have?
Looking at the proposed amount of server memory, number of sessions and extremely low maximum timings (even if it's just time in DB), I would say you'll have to have at least 4 of such servers and very small DB size (less than a dozen of GB): for 1000 dedicated Oracle processes at least 4-5GB of PGA is required. Suppose your SGA would be 1.7 GB (since 64bit installation is not necessary for that type of server, and 1.7GB is default possible maximum for SGA on a 32bit Linux), out of which 384MB - shared pool, 128MB - large+java pools+redo log buffer, and the rest part for cache (around 1100MB). ~1 GB should be reserved for OS. Around 1GB per server is left for PGA. That's why 4 servers is low bound with 4GB of memory. And my calculations are actually for single instance, not a RAC node. For RAC there are additional requirements (additional processes, clusterware, maybe ASM, etc.).
I wouldn't even try to run an application with that requirement to response time on a nodes with such a low amount physical memory. 8-32 GB is a more appropriate choice, IMO.

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