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Diffstat (limited to 'iredis/data/commands/latency-histogram.md')
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diff --git a/iredis/data/commands/latency-histogram.md b/iredis/data/commands/latency-histogram.md new file mode 100644 index 0000000..a97928b --- /dev/null +++ b/iredis/data/commands/latency-histogram.md @@ -0,0 +1,38 @@ +The `LATENCY HISTOGRAM` command reports a cumulative distribution of latencies in the format of a histogram for each of the specified command names. +If no command names are specified then all commands that contain latency information will be replied. + +Each reported histogram has the following fields: + +* Command name. +* The total calls for that command. +* A map of time buckets: + * Each bucket represents a latency range. + * Each bucket covers twice the previous bucket's range. + * Empty buckets are not printed. + * The tracked latencies are between 1 microsecond and roughly 1 second. + * Everything above 1 sec is considered +Inf. + * At max there will be log2(1000000000)=30 buckets. + +This command requires the extended latency monitoring feature to be enabled (by default it's enabled). +If you need to enable it, use `CONFIG SET latency-tracking yes`. + +@examples + +``` +127.0.0.1:6379> LATENCY HISTOGRAM set +1# "set" => + 1# "calls" => (integer) 100000 + 2# "histogram_usec" => + 1# (integer) 1 => (integer) 99583 + 2# (integer) 2 => (integer) 99852 + 3# (integer) 4 => (integer) 99914 + 4# (integer) 8 => (integer) 99940 + 5# (integer) 16 => (integer) 99968 + 6# (integer) 33 => (integer) 100000 +``` + +@return + +@array-reply: specifically: + +The command returns a map where each key is a command name, and each value is a map with the total calls, and an inner map of the histogram time buckets. |