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Table 5-3 shows the parameter settings that are suggested for this configuration.<br />
Table 5-3 Two-tiered configuration using JMS file store parameter settings<br />
Parameter names<br />
Business Process Choreographer database<br />
(BPEDB) settings<br />
APP_CTL_HEAP_SZ 144<br />
APPGROUP_MEM_SZ 13001<br />
CATALOGCACHE_SZ 521<br />
CHNGPGS_THRESH 55<br />
DBHEAP 600<br />
LOCKLIST 500<br />
LOCKTIMEOUT 30<br />
LOGBUFSZ 245<br />
LOGFILSIZ 1024<br />
LOGPRIMARY 11<br />
LOGSECOND 10<br />
MAXAPPLS 90<br />
MAXLOCKS 57<br />
MINCOMMIT 1<br />
NUM_IOCLEANERS 6<br />
NUM_IOSERVERS 10<br />
PCKCACHESZ 915<br />
SOFTMAX 440<br />
SORTHEAP 228<br />
STMTHEAP 2048<br />
DFT_DEGREE 1<br />
DFT_PREFETCH_SZ 32<br />
UTIL_HEAP_SZ 11663<br />
I<strong>MB</strong>DEFAULTBP 65536<br />
In addition to these database-level parameter settings, you must modify several other<br />
parameters by using the administrative console. These settings primarily affect concurrency<br />
(thread settings):<br />
►<br />
►<br />
►<br />
The amount of expected concurrency influences the size of the thread pool because more<br />
in-flight transactions require more threads. As a possible remedy, you might increase the<br />
size of the default thread pool beyond the default of 50 threads.<br />
Set the maximum concurrency to 50 threads for activation specifications.<br />
For the Business Process Choreographer Database (BPEDB), increase the database<br />
connection pool size to 60 and the statement cache size to 300.<br />
Chapter 5. Initial configuration settings 103
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