Re: Lock request timeout with no entry in systemtable "Locks"

Hi Thorsten,

Thanks for your advise. The analyser doesn't give some lines you are mentioning.

I waited two 15 min. cycles and there was 1 lock request timeout in the first and 5 in the second.

Here is the output of the DBAN.prt. I blanked some lines, which should not be from any interest:

---- Start DBAN.prt -------

*  I

*  I  Version information:

*  I  --------------------

*  I  Database Analyzer configuration file dbanalyzer78.cfg, version 7.8.02 Build 037-121-248-697

*  I

*  I  System information:

*  I  -------------------

*  I  Number of CPUs: 4, processor type: x86_64

*  I  Physical memory 16087 MB, virtual memory 15257 MB, memory allocated from instance: 9159 MB

*  I  Operating system: Linux 3.2.0-4-amd64 #1 SMP Debian 3.2.54-2

*  I

*  I  Instance configuration information:

*  I  -----------------------------------

* W1  No configuration check of instance REALDB has been performed so far!

*  I  Number of CPUs 'MaxCPUs' usable by instance: 4, max user tasks: 300

*  I  Size of data cache 992218 pages (7.57 GB), 98.57% in use, size of converter cache 7548 pages (0.06 GB)

*  I  Size of pin area 49664 pages, 0.00% in use.

* W1  Limit of configured 'SharedSQLCommandCacheSize'(262144KB ) reached!

*  I  Number of data volumes 7, usable size 18199986 pages (138.85 GB), used size 13952196 pages (106.45 GB), filling lev

*  I

*  I  Additional information:

*  I  -----------------------

*  I  Instance REALDB (srv-syntia-real-db) is up since 2014-08-15 12:47:41

*  I  Database Analyzer (pid 16400, connected to task T514) is up since 2014-10-07 13:33:21

*  I  Diagnostic function activated! 'UseExtendedTimeMeasurement' : YES

*  I  Diagnostic function activated! 'EnableCommandMonitor' : YES

* W1  Number of tables where update statistics is required: 177

* W1  Owner: OMSREAL, table: JOBSUPPLIERPOSITION

* W1  Owner: OMSREAL, table: KDBLIST

...

* W1  Owner: OMSREAL, table: TICKETSTATE

* W1  Owner: OMSREAL, table: JOBSUPPLIER

*  I  16 tables contain > 1.000.000 records but only 20.000 rows will be sampled for statistics

* W1  Table OMSREAL.JOBPARTYREMARK contains 4791011 rows (96132 pages), sample rows: 20000

...

* W1  Table OMSREAL.JOBPARTYTIMESTAMP contains 1838587 rows (23600 pages), sample rows: 20000

* W2  Log queue overflows: 916, configured log queue pages: 50 for each of 4 log queues

* W2  Deadlocks detected: 1

* W2  Lock request timeouts: 19919

*  I  SQL commands executed: 1622571083

*  I  SQL commands executed: 525490, avg. 584.32 per second

* W1  4 command cache cleanups! 0 commands reloaded, 0 execution plans and 24203 commands deleted

*  I  UKT10: commands: 378812493, dispatches: 3621610859, user task 276 is running, 2 tasks are waiting for CPU

*  I  UKT10: user task 285 is waiting for CPU in state 'Command wait'

*  I  UKT10: user task 271 is waiting for CPU in state 'Command wait'

* W1  Selects and fetches selectivity 2.91%: 333190 selects and fetches, 193646568 rows read, 5643531 rows qualified

* W3  35073 table scans, selectivity 0.08%: 166541187 rows read, 125514 rows qualified

* W1  Lock request timeouts: 1

* W1  DATA39: collision rate 44.75%, 110461 collisions, no waits, 246814 accesses on region 43

* W1  TAB1: collision rate 80.69%, 144312 collisions, no waits, 178849 accesses on region 110

*  I  Garbage collector tasks activated 720 times, currently active: 0

*  I  Number of runnable user tasks: 1

*  I  server tasks activity. Dispatches: 46530, physical reads: 26 (50 pages), physical writes: 24 (24 pages)

*  I  CPU utilization: instance REALDB: 34.44% (usr: 33.56%, sys: 0.89%), host: 40.89% (usr: 34.89%, sys: 4.89%, wio: 1.1

*  I  Number of pages marked for reclustering: 63, clustered read operations: 50938, clustered pages read: 545516

*  I  SQL commands executed: 415692, avg. 461.49 per second

* W1  3 command cache cleanups! 0 commands reloaded, 0 execution plans and 26586 commands deleted

* W1  Selects and fetches selectivity 4.33%: 292760 selects and fetches, 200890477 rows read, 8706554 rows qualified

* W3  33963 table scans, selectivity 0.11%: 174027706 rows read, 191329 rows qualified

* W2  71 index range accesses, selectivity 2.28%: 105240 rows read, 2397 rows qualified

* W1  Lock request timeouts: 5

*  I  Garbage collector tasks activated 770 times, currently active: 0

*  I  server tasks activity. Dispatches: 27878, physical reads: 26 (126 pages), physical writes: 12 (12 pages)

*  I  CPU utilization: instance REALDB: 37.51% (usr: 36.63%, sys: 0.89%), host: 42.84% (usr: 37.51%, sys: 4.33%, wio: 1%,

*  I  Number of pages marked for reclustering: 117, clustered read operations: 44402, clustered pages read: 457567

*  I  Cluster compression checked 3 segments, blocks read: 94, pages moved: 15

---  END DBAN.prt -----

Perhaps you have any ideas about this!

Thanks and

best regards

   Hannes