Will a database server perform better running on 2 CPUs with 16 cores or 4 CPUs with 8 cores?

Posted by AlexOdin on Server Fault See other posts from Server Fault or by AlexOdin
Published on 2012-06-23T23:58:17Z Indexed on 2012/06/24 3:17 UTC
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Filed under:

Performance

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database

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multicore

What I have:

an online financial application (ASP.NET, C#)
at peak we have 5K+ simultaneous users
backend is running on Oracle 11g (active server + stand-by using Active Data Guard). At peak - 4K-5K database sessions
Oracle is installed on Linux 5.8 (Oracle's unbreakable version)
the database size: 7TB
disk storage: NetApp (connected with 10GB network)

I would like to replace old servers (IT will purchase HP blades BL685C). Servers will have 256GB of RAM.

I need your help to figure out what to do with CPUs and cores. Options:

2 CPUs (2.3 GHz) with 16 cores each
4 CPUs (3.0 GHz) with 8 cores each

Question: Which one should I pick?

P.S. Next year, we will migrate from Oracle to SQL server. I hope, whatever option you recommend will work for both platforms

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