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  Oracle Tips by Burleson

Database Characteristics that should have all files moved to SSD

There are some databases that should have all of their files moved to SSD. These databases tend to have at least one of the following characteristics:

High concurrent access: DBA’s managing databases that are being hit by a large number of concurrent users should consider storing all of their data on SSD. This will ensure that storage is not a bottleneck for the application and maximize the utilization of servers and networks. I/O wait time will be minimized and servers and bandwidth will be fully utilized.

Frequent random accesses to all tables: For some databases, it is impossible to identify a subset of files that are frequently accessed. Many times these databases are effectively large indices.

Small to medium size databases: Given the fixed costs associated with buying RAID systems, it is often economical to buy a SSD to store small to medium sized databases. A RamSan-210, for example, can provide 32GB of database storage for the price of some enterprise RAID systems.


The above book excerpt is from:

Oracle RAC & Grid Tuning with Solid State Disk
Expert Secrets for High Performance Clustered Grid Computing

ISBN: 0-9761573-5-7
Mike Ault, Donald K. Burleson

http://www.rampant-books.com/book_2005_2_rac_ssd_tuning.htm  

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