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Re: Multiple block sizes

From: Tanel Poder <>
Date: Thu, 25 Sep 2003 07:44:46 -0800
Message-ID: <>


I think putting your small tables to 2K block size is quite pointless (unless you have tens of thousands of these tables continously in buffer cache).


  I have little bit experience on that. I am keeping indexes in 32K block 'cause Oracle access indexes sequentially and placing indexes in large block would help in reducing IO. All the tables are in 8K block size but you can think about putting small tables in 2K or 4KB block size to better utilize your RAM. We are on AIX 5.1 , Oracle 9202.     -----Original Message-----
    From: Mladen Gogala []     Sent: Wednesday, September 24, 2003 9:05 AM     To: Multiple recipients of list ORACLE-L     Subject: Multiple block sizes

    Does anybody have any experience with the multiple block sizes in the database? I'm about to reconfigure     my database to have a tablespace with blocksize 16k in addition to the existing 8k tablespaces. Tables     in this tablespace will be loaded weekly and read daily, frequently using full table scan (DW style reporting.     I'm planning to have bitmap indexes and the rest of the DW arsenal). Does anybody have any negative experiences     with that kind of stuff? It's on RH 7.3. Am I running into ora-7445 and ora-0600 type errors?

    Mladen Gogala
    Oracle DBA

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Author: Tanel Poder

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