we have sapdb 7.4 running with jboss on win xp server having 1GB RAM.

as you already know cache_size is the most critical parameter in sapdb

we decided to give min 128MB, max 512MB for jboss 

set JAVA_OPTS=%JAVA_OPTS% -Dprogram.name=%PROGNAME% -Xmn128m -Xmx512m set 
JBOSS_HOME=%DIRNAME%\.. 

and thougt that it would be enough to separate 160MB to sapdb cache  40000 (4K each 
page) totallly 

cache_size=160 MB

but for tables having more than 300.000  rows our queries do not use the index that 
must certainly be used and do table scans whic means
the reports running these queries long last

is it possible (logical) to increase the cache_size?

thanks a lot

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