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I/O Tuning settings (aio-max-nr, db_file_multiblock_read_count, db_block_size, AU)

edited Jan 16, 2014 2:31AM in Exadata General (MOSC) 2 commentsAnswered
Hi Exadata Guys,


Our team have being reading some docs about I/O tuning and now we are in doubt about how can we address those parameters mentioned on the subject of this mail regarding our environment settings. 

First of all, we are talking about a Quarter Exadata X2-2 running two RAC databases. GI and DB software version are 11.2.0.3. These databases were configured with parameters: db_block_size = 8192; db_file_multiblock_read_count = 128. The diskgroups AU are sized at 4M and the RHEL 5.7 (2.6.18-274.18.1.0.1.el5) has the kernel parameter aio-max-nr as 3145728 (3M).

After reading some docs and also the technical doc 

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