RE: Filesystem Block Size ? 1K or 4K or 8K ?

Date: Tue, 14 Oct 2008 16:58:02 +0530
Message-ID: <>


Anybody worked with Direct I/O? Does it really help performance? ... My Distant (was long ago) past experience of using Direct I/O with 8K F.S. Block size on Solaris 8 resulted in Poor performance. Optionally should we insist on F.S. Block Size of 8K (NOT 1K) Without Direct I/O?


Sent: Tuesday, October 14, 2008 4:38 PM

HP who is partnering the Benchmark states - since Filesystems are being Mounted with Direct I/O therefore 1K F.S. block size is preferred to 8K.

From: [] Of course set to 8k

Date: Tue, 14 Oct 2008 15:53:52 +0530

We are in the process of Setting up DB Server for an OLTP Banking Application Benchchmark.

HP-UX B.11.31
system device block size(think this is the O.S. block size) = 1K Base page size = 4K.
DB_block_size = 8K

Should the Filesystem (VXFS) Block Size be set to 1K, 4K or 8K? ... Personally I think it should be 4 K (i.e. Equal to the Page-size)

Cheers & Thanks V much


P.S. Will provide any data needed

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Received on Tue Oct 14 2008 - 06:28:02 CDT

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