xmservd Command

The xmservd daemon is always started from inetd. Therefore, command line options must be specified on the line defining xmservd to inetd in the file /etc/inetd.conf .

Syntax

xmservd [-v] [-b UDP_buffer_size] [-i min_remote_interval] [-l remove_consumer_timeout] [-m supplier_timeout] [-p trace_level] [-s max_logfile_size] [-t keep_alive_limit] [-x xmservd_execution_priority]

Flags

All command line options are optional. The options are:

v

Verbose. Causes parsing information for the xmservd recording configuration file to be written to the xmservd log file.

b

Defines the size of the buffer used by the daemon to send and receive UDP packets. The buffer size must be specified in bytes and can be from 4,096 to 16,384 bytes. The buffer size determines the maximum number of data values that can be sent in one data_feed packet. The default buffer size is 4096 bytes, which allows for up to 124 data values in one packet.

i

Defines the minimum interval in milliseconds that data feeds can be sent with. Default is 500 milliseconds. A value between 100 and 5,000 milliseconds can be specified. Any value specified is rounded to a multiple of 100 milliseconds. Whichever minimum remote interval is specified causes all requests for data feeds to be rounded to a multiple of this value. See further details in section "Rounding of Sampling Interval" .

l

(Lowercase L). Sets the time_to_live after feeding of statistics data has ceased as described in section "Life and Death of xmservd" . Must be followed by a number of minutes. A value of 0 (zero) minutes causes the daemon to stay alive forever. The default time_to_live is 15 minutes.

This value is also used to control when to remove inactive data-consumers as described in "Removing Inactive Data-Consumers" .

m

When a dynamic data-supplier is active, this value sets the number of seconds of inactivity from the DDS before the SPMI assumes the DDS is dead. When the timeout value is exceeded, the SiShGoAway flag is set in the shared memory area and the SPMI disconnects from the area. If this flag is not given, the timeout period is set to 90 seconds.

The size of the timeout period is kept in the SPMI common shared memory area. The value stored is the maximum value requested by any data consumer program, including xmservd.

p

Sets the trace level, which determines the types of events written to the log file /etc/perf/xmservd.log1 or /etc/perf/xmservd.log2 . Must be followed by a digit from 0 to 9, with 9 being the most detailed trace level. Default trace level is 0 (zero), which disables tracing and logging of events but logs error messages.

s

Specifies the approximate maximum size of the log files. At least every time_to_live minutes, it is checked if the currently active log file is bigger than max_logfile_size. If so, the current log file is closed and logging continues to the alternate log file, which is first reset to zero length. The two log files are /etc/perf/xmservd.log1 and /etc/perf/xmservd.log2 . Default maximum file size is 100,000 bytes. You can not make max_logfile_size smaller than 5,000 or larger than 10,000,000 bytes.

t

Sets the keep_alive_limit described in section "Life and Death of xmservd" . Must be followed by a number of seconds from 60 to 900 (1 to 15 minutes). Default is 300 seconds (5 minutes).

x

Sets the execution priority of xmservd. Use this option if the default execution priority of xmservd is unsuitable in your environment. Generally, the daemon should be given as high execution priority as possible (a smaller number gives a higher execution priority).

On systems other than IBM RS/6000 systems, the -x flag is used to set the nice priority of xmservd. The nice priority is a value from -20 to 19. Default is -20.