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CHAPTER 13
•
Reads/Writes: Physical reads and writes performed by the buffer
cache
•
PF/PFRead: Prefetch requests and reads done for prefetch
•
GDirty: Number of times the LRU buffer was grabbed dirty and
Adaptive Server IQ had to write it out before using it
•
Pin%: Percentage of pages in the buffer cache in use and locked
•
Dirty%: Percentage of buffer blocks that were modified
•
produces the same results as
-cache_by_type
IQ page type. (An exception is the Bwaits column, which shows a total
only.) This format is most useful when you need to supply information to
Sybase Technical Support.
•
suffix creates a monitor output file named
-file_suffix
<dbname>.<connid>-<main_or_temp>-<suffix>
specify a suffix, it defaults to iqmon.
•
displays main or temp (private) buffer cache I/O rates and compression
-io
ratios. The fields displayed are:
•
Reads: Physical reads performed by the buffer cache
•
Lrd(KB): Logical kilobytes read in
•
Prd(KB): Physical kilobytes read in
•
Rratio: Compression ratio of logical to physical data read in
•
Writes: Physical writes performed by the buffer cache
•
Lwrt(KB): Logical kilobytes written
•
Pwrt(KB): Physical kilobytes written
•
Wratio: Compression ratio of logical to physical data written
•
displays information on the main or temp buffer allocator, which
-bufalloc
reserves space in the buffer cache for objects like sorts, hashes, and
bitmaps.
•
OU: OptimizeForThisManyUsers option setting
•
AU: Current number of active users
•
MaxBuf: Number buffers under control of the buffer allocator
•
Avail: Number of currently available buffers for pin quota allocation
Monitoring and Tuning Performance
, but broken down by
-cache
. If you do not
469
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