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Storage not supporting 1MB IO BLOCK SIZE for Oracle DB 12c

edited Jan 27, 2023 7:18PM in Database Tuning (MOSC) 18 commentsAnswered

Hi everyone


im posting this question because i have an oracle database 12c RAC, using a Hitachi g600 SAN Storage, the SAN administrators are complaining because they see 1mb blocks issued to the box and the box doesn't have capability to manage this blocksizes, im seeing this behaviour when full table scan is performed, the db_multiblock_read is in 128k (default) and db_block_size 8k, i guess that when a db multiblock read is requested 128*8 is the 1mb that they see.. but i don't know if i need to change this parameter or if i have to do something on the box

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