Designing a table for high rate of concurrent inserts and selects...

I am looking for some recommendations on designing a table the will be inserted into from both nodes of a 2 node cluster quite heavily during peak hours when we are taking alot of orders. We are an online store and we are designing a table that will be used to hold product sku's for items that are placed in a shoppers cart at the same time and then we plan to use this table as a way of subtracting the inventory in this table as a minus in a view of our true nventory quantities?
Not sure if that was clear but basically this table will be getting hit heavily for inserts and at the same time we will be using the data in the table to select from it so we can subtract the shu's that exists in the table.
I am looking for techniques that maybe some of our guru's have implemented in this type of design in a rac environment that will help in the conncurrency that we are expectiing.
Should I be building my tables with the smallest block size available as to avoid hot block in the db buffer cache and also we are using a sequence to generate and ID on the table and I have set a large cache size on the sequence (5000).
We are planning on using ASSM table spaces with auto extent and segment space management as everthing we have read indicated that this is the best type of tablespace mgmt in RAC.
What other factors should I be considering.
any help or suggestions are greatly appreciated.
Thanks in advance.

user520056 wrote:
I am looking for some recommendations on designing a table the will be inserted into from both nodes of a 2 node cluster quite heavily during peak hours when we are taking alot of orders. We are an online store and we are designing a table that will be used to hold product sku's for items that are placed in a shoppers cart at the same time and then we plan to use this table as a way of subtracting the inventory in this table as a minus in a view of our true nventory quantities?
Not sure if that was clear but basically this table will be getting hit heavily for inserts and at the same time we will be using the data in the table to select from it so we can subtract the shu's that exists in the table.
I am looking for techniques that maybe some of our guru's have implemented in this type of design in a rac environment that will help in the conncurrency that we are expectiing.
Should I be building my tables with the smallest block size available as to avoid hot block in the db buffer cache and also we are using a sequence to generate and ID on the table and I have set a large cache size on the sequence (5000).
We are planning on using ASSM table spaces with auto extent and segment space management as everthing we have read indicated that this is the best type of tablespace mgmt in RAC.
What other factors should I be considering.
any help or suggestions are greatly appreciated.
Thanks in advance.See my .sig for other questions you should answer - OS, DB (version &c.),
CPU/RAM/Disk...
If you're running this on a 386 with 16 MB of RAM with on HDD, then you could
have problems - if you're running it on something different, well that changes
the possible answers.
Paul...
When asking database related questions, please give other posters
some clues, like OS (with version), version of Oracle being used and DDL.
Other trivia such as CPU + Disk configuration might also be useful.
The exact text and/or number of error messages is useful (!= "it didn't work!"). Thanks.
Furthermore, as a courtesy to those who spend time analysing and attempting to help,
please do not top post and do try to trim your replies!

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