Hi,
on MaxDB 7.6.6.10 community license, running on Linux 64bit using analyzer I can see follow output:
===== #613 at 2013-07-31 14:52:52
* I SQL commands executed: 289821, avg. 960.5 per second
* W1 1 command cache cleanups! 16 commands reloaded, 120 execution plans and 3040 commands deleted
* W3 6641 table scans, selectivity 0.23%: 3605289 rows read, 8141 rows qualified
* W1 DATA61: collision rate 38.86%, 72859 collisions, 1 waits (0%), 187481 accesses on region 112
* W1 DATA64: collision rate 59.33%, 88610 collisions, no waits, 149345 accesses on region 115
* W1 DATA3: collision rate 28.7%, 78293 collisions, no waits, 272814 accesses on region 54
* W1 DATA23: collision rate 34.87%, 56068 collisions, no waits, 160802 accesses on region 74
* W1 DATA43: collision rate 28.5%, 84728 collisions, no waits, 297304 accesses on region 94
* W1 DATA18: collision rate 27.62%, 59965 collisions, no waits, 217098 accesses on region 69
* W1 DATA24: collision rate 52.85%, 81855 collisions, no waits, 154873 accesses on region 75
* W1 DATA2: collision rate 36.78%, 57084 collisions, no waits, 155204 accesses on region 53
* W1 DATA42: collision rate 40.49%, 77149 collisions, no waits, 190546 accesses on region 93
* W1 DATA51: collision rate 33.76%, 69859 collisions, no waits, 206934 accesses on region 102
* W1 DATA7: collision rate 31.11%, 73546 collisions, no waits, 236426 accesses on region 58
* W1 DATA37: collision rate 26.68%, 95941 collisions, no waits, 359565 accesses on region 88
* W1 DATA40: collision rate 38.18%, 51877 collisions, no waits, 135880 accesses on region 91
* W1 DATA25: collision rate 28.15%, 67961 collisions, no waits, 241391 accesses on region 76
* I Garbage collector tasks activated 2 times, currently active: 0
* I 3420 physical reads for user task 550, 14618 commands, application pid 8219
* I 3376 physical reads for user task 139, 15836 commands, application pid 8219
* I CPU utilization: instance MAXDB1: 23.84% (usr: 23.51%, sys: 0.33%), host: 56.62% (usr: 23.84%, sys: 0.99%, wio: 31.79%, idle: 741.39%)
How I can solve these collision rates, there is a way to check what data, table or row exists on these regions? Any better way to analyse this?
Best regards.
Clóvis