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Block#: 95065709
Temporary IQ Blocks Used:
Main Reserved Blocks Available:
Temporary Reserved Blocks Available:
Memory:
Main IQ Buffers:
Temporary IQ Buffers:
Main IQ I/O:
C760342/D761393/P736587 D:24753 C:65.9
Temporary IQ I/O:
C2609951/D3838862/P1228941
D:2609913 C:46.3
Old Versions:
Active Txn Versions:
Monitoring the buffer caches
Starting the buffer cache monitor
CHAPTER 13
Adaptive Server IQ provides a tool to monitor the performance of the buffer
caches. This monitor collects statistics on the buffer cache, memory, and I/O
functions taking place within Adaptive Server IQ, and stores them in a log file.
Buffer cache performance is a key factor in overall performance of Adaptive
Server IQ. Using the information the monitor provides, you can fine tune the
amount of memory you allocate to the main and temp buffer caches. If one
cache is performing significantly more I/O than the other, reallocate some of
the memory appropriately. Reallocate in small amounts such as 10 to 50MB
and on an iterative basis. After reallocating, rerun the workload and monitor
the changes in performance.
You run the Adaptive Server IQ buffer cache monitor from DBISQL. Each
time you start the monitor it runs as a separate kernel thread within DBISQL.
Use this syntax to start the monitor:
IQ UTILITIES { MAIN | PRIVATE }
INTO dummy_table_name
START MONITOR ' monitor_options [ ... ]'
starts monitoring of the main buffer cache, for the IQ Store of the
MAIN
database you are connected to.
Monitoring and Tuning Performance
610 of 17646576, 0%=4Mb, Max Block#: 0
1280 of 1280, 100%=10Mb
1280 of 1280, 100%=10Mb
Current: 3351mb, Max: 3384mb
Used: 11172, Locked: 0
Used: 38, Locked: 0
I: L88043944/P495510 O:
I: L16515025/P1222153 O:
1 = 59Gb
0 = C:0Mb/D:0Mb
467
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