Using command line

You can issue the command provided here to configure filter cache.

About this task

idsldapmodify -D <adminDN> -w <adminPW> -i <filename> 

where <filename> contains: 

dn: cn=Front End, cn=Configuration 
changetype: modify 
replace: ibm-slapdFilterCacheSize 
ibm-slapdFilterCacheSize: <value to be set in numerals> 

- 
replace: ibm-slapdFilterCacheBypassLimit 
ibm-slapdFilterCacheBypassLimit: <value to be set in numerals>