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8.2. The check_tungsten_latency Command

The check_tungsten_latency command reports warning or critical status information depending on whether the latency across the nodes in the cluster is above a specific level.

Table 8.13. check_tungsten_latency Options

OptionDescription
-cReport a critical status if the latency is above this level
--perfdataShow the latency performance information
--perslave-perfdataShow the latency performance information on a per-slave basis
-wReport a warning status if the latency is above this level

The command outputs information in the following format:

LEVEL: DETAIL

Where DETAIL includes detailed information about the status report, and LEVEL is:

  • CRITICAL — latency on at least one node is above the specified threshold level for a critical report. The host reporting the high latency will be included in the DETAIL portion:

    For example:

    CRITICAL: host2=0.506s
  • WARNING — latency on at least one node is above the specified threshold level for a warning report. The host reporting the high latency will be included in the DETAIL portion:

    For example:

    WARNING: host2=0.506s
  • OK — status is OK; the highest reported latency will be included in the output.

    For example:

    OK: All slaves are running normally (max_latency=0.506)

The -w and -c options must be specified on the command line, and the critical figure must be higher than the warning figure. For example:

shell> check_tungsten_latency -w 0.1 -c 0.5
CRITICAL: host2=0.506s

Performance information can be included in the output to monitor the status. The format for the output is included in the DETAIL block and separates the maximum latency information for each node with a semicolon, and the detail block with a pipe symbol. For example:

shell> check_tungsten_latency -w 1 -c 1 --perfdata
OK: All slaves are running normally (max_latency=0.506) |  max_latency=0.506;1;1;;

Performance information for all the slaves in the cluster can be output by using the --perslave-perfdata option which must be used in conjunction with the --perfdata option:

shell> check_tungsten_latency -w 0.2 -c 0.5 --perfdata --perslave-perfdata
CRITICAL: host2=0.506s | host1=0.0;0.2;0.5;; host2=0.506;0.2;0.5;;