You should distribute the work load as evenly as possible
over the time your system is running. Although the work schedule
for your site may make it difficult to schedule interactive users
at optimum times, the following techniques may be helpful:
Run large jobs as batch jobs--Establish a site policy
that encourages the submission of large jobs on a batch basis. Regulate
the number of batch streams so that batch usage is high when interactive
usage is low. You might also want to use DCL command qualifiers
to run batch jobs at lower priority, adjust the working set sizes,
or control the number of concurrent jobs. For information about
setting up your batch environment, see the HP OpenVMS System Manager's Manual, Volume 1: Essentials.
Restrict system use--Do not permit more
users to log in at one time than the system can support with an adequate
response time. You can restrict the number of interactive users
with the DCL command SET LOGINS/INTERACTIVE. You can also control
the number of concurrent processes with the MAXPROCESSCNT system
parameter, and the number of remote terminals allowed to access
the system at one time with the RJOBLIM system parameter. See
Modifying System Parameters with AUTOGEN for information
about modifying system parameters. Refer to the HP OpenVMS System Management Utilities Reference Manual for descriptions
of all system parameters. You might
also restrict use of the system by groups of users to certain days
and hours of the day. You can use the Authorize utility to define
the permitted login hours for each user. In particular, refer to
the AUTHORIZE qualifier /PRIMEDAYS. For more information, see the
AUTHORIZE section of the HP OpenVMS System Management Utilities Reference Manual. You can use the DCL command SET DAY to override the conventional
day of the week associations for primary and secondary days. For
example, you might want to specify a primary day of the week as
a secondary day when it is a holiday.
Design applications to reduce demand on binding
resources--If you know where your system bottlenecks are
or where they will likely occur in the near future, you can distribute
the work load more evenly by planning usage that minimizes demand
on any bottleneck points. (Refer to the Guide to OpenVMS File Applications.)