IBM 000-8697 사용자 설명서

IBM Informix OnLine Database Server Administrator’s Guide

Buffer size and the amount of

I/O

 per write are reported by the

DB-M

onitor

Status menu, Logs option or as part of the tbstat -l or tbstat -p output:

If the physical log value of

Pages/IO

 is less than 90 percent of the value of

Bufsize

, you might be able to improve performance by adjusting the buffer

size. Refer to

 for more information.

Bufsize

is the size of the physical or logical log buffer. The

Bufsize

field appears twice in the display: once for the physical log
buffer and once for the logical log buffer.

Pages/IO

is the number of pages, on average, that are written to disk
with each

I/O

 operation. The

Pages/IO

field also appears

twice in the display: once for writes to the physical log and
once for writes to the logical log.