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5-12 IBM Informix OnLine Database Server Administrator’s Guide
Bufsize Pages/IO Fields
Buffer size and the amount of I/O per write are reported by the DB-Monitor
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 page 5-15 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.