NET/MASTER Management Services (MS) Command Reference Manual

LBANNER
SYSPARMS LOGLOWATER
NonStop NET/MASTER MS Commands
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LOGLOWATER
LOGLOWATER= number
specifies the size to which the activity log message queue must decrease before the
reading of EMS messages is resumed.
When NonStop NET/MASTER MS receives (reads) messages, the messages are
sent to a queue before being written to a log. Because messages can be read at a
faster rate than they can be written, the message queue can grow rapidly, thus
reducing the efficiency of NonStop NET/MASTER MS.
The solution to this problem is to suspend the reading of EMS messages when the
queue increases to a specified size, hold them and to resume the reading of EMS
messages when the queue decreases to a specified size. The value of the
SYSPARMS LOGLOWATER command determines the point at which NonStop
NET/MASTER MS resumes reading EMS messages.
It is important to note that, although all messages affect the length of the message
queue, only EMS messages are suspended.
The value of the LOGLOWATER operand must be a number from 0 through
32,000. The default value is 100.
Considerations
The SYSPARMS LOGLOWATER command is used in conjunction with the
SYSPARMS LOGHIWATER command.
It is possible (although not desirable) to set the LOGLOWATER value to be greater
than the LOGHIWATER value. This combination causes NonStop NET/MASTER
MS to suspend each incoming message until the previous message has been
written.
Example
The following example sets the LOGLOWATER value to 50 and the LOGHIWATER
value to 300:
SYSPARMS LOGLOWATER=50
SYSPARMS LOGHIWATER=300