Hilmar,
It can be configured in the idb file for the process with the LOGBACKUPMAX parameter. For example, in SS.idb file located in the $SPECROOT/lib/SDPM/partslist,
$ cat SS.idb
# Processd Install Ticket for SpectroSERVER Daemon.
PARTNAME;SS;
APPNAME;SpectroSERVER Daemon;
WORKPATH;$SPECROOT/SS;
LOGNAMEPATH;$WORKPATH/VNM.OUT;
LOGBACKUPMAX;10;
ADMINPRIVS;y;
#AUTORESTART;N;
#AUTOBOOTSTART;N;
STATEBASED;y;
NUMPROCS;3; // unlimited
RETRYTIMEOUT;0; // seconds
#TICKETUSER;$USER;
RETRYMAX;0; // retries
STARTPRIORITY;20;
SERVERPROCESS;Y;
#ENV;<var>=<value>;
ARGV;$SPECROOT/SS/SpectroSERVER<CSEXE>; //
Joe