Critical SYSGEN parameters for overall Dispatcher
functioning
The SYSGEN parameter MAXPROCESSCNT must be large enough to accomodate the number of server processes, in addition to any other processes on the system.
Sites running DEC TCP/IP Services (UCX) should set the SYSGEN parameter
CHANNELCNT=Sumservices MAX_CONNS + Sumservices
(MAX_CONNS*MAX_PROCS)+30.
Sites running MultiNet or TCPware can avoid the need to change their system's CHANNELCNT by instead setting UCX_HOLD=0 in the Dispatcher configuration file.
SYSGEN parameters relevant for mailbox servers
SYSGEN system minimums and system defaults for quotas may affect the
quotas for server processes. SYSGEN parameters especially relevant for
PMDF mailbox servers are:
PQL_MASTLM, PQL_DASTLM,
PQL_MBIOLM, PQL_DBIOLM,
PQL_MBYTLM, PQL_DBYTLM,
PQL_MCPULM, PQL_DCPULM,
PQL_MDIOLM, PQL_DDIOLM,
PQL_MENQLM, PQL_DENQLM,
PQL_MFILLM, PQL_DFILLM,
PQL_MJTQUOTA, PQL_DJTQUOTA,
PQL_MPGFLQUOTA, PQL_DPGFLQUOTA,
PQL_MTQELM, PQL_DTQELM,
PQL_MWSDEFAULT, PQL_DWSDEFAULT,
PQL_MWSQUOTA, PQL_DWSQUOTA,
PQL_MWSEXTENT, PQL_DWSEXTENT (limited by WSMAX),
VIRTUALPAGECNT, and CHANNELCNT. Rather than using the SYSGEN values,
however, the POP and IMAP servers will preferentially use an explicit
quota settings from their Dispatcher configuration file service
sections. These SYSGEN values are only used if a Dispatcher quota
option has not been set.
The quotas for server processes may be controlled via quota options in the Dispatcher configuration file. The top of the Dispatcher configuration file may define global default quotas, and quota values specific for specific services may be set in that service's definition section in the Dispatcher configuration file.