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Minimum unit of I/O

P: n/a
What is the minimum unit of I/O in DB2 9. Is it extendsize or prefetch
size or pagesize ?

Nov 9 '07 #1
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Sam Durai <re***********@gmail.comwrites:
What is the minimum unit of I/O in DB2 9. Is it extendsize or
prefetch size or pagesize ?
The min unit of i/o is always the pagesize. Extentsize is the unit a
prefetcher will issue i/o for when prefetching. Prefetchsize is the
total i/o being done during prefetching via multiple prefetchers.

For details see the Performance doc in the DB2 guides.

http://publib.boulder.ibm.com/infoce...c/c0004962.htm

--
Haider
Nov 9 '07 #2

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