ns::stats::Sampler method sampling history (public)

 <instance of ns::stats::Sampler> sampling history -from from  \
    -to to  [ -server server ] [ -limit limit ] [ -cursor cursor ]

Defined in

Read the bounded process-wide recent sample buffer without SQLite. Retains at most 180 compact samples and 15 minutes at publication. Returns interval metrics, coverage and timestamp-based paging. Raw/per-thread CPU counters are omitted. Reading does not collect, start sampling, advance baselines or write persistent history. The buffer survives sampler stop/start but not a process restart.

Switches:

-from (required, integer)

Inclusive lower bound in epoch seconds; must be nonnegative.

-to (required, integer)

Exclusive upper bound in epoch seconds; after from, at most 24 hours later and no later than now.

-server (optional)

Optional historical virtual-server name; empty returns all stored server data.

-limit (optional, integer, defaults to "180")

Maximum records per page, 1..180; default 180.

-cursor (optional, integer, defaults to "0")

Nonnegative timestamp cursor in microseconds, default 0; pass nextCursor unchanged for continuation.

Returns:

Dictionary containing records, retained bounds, coverage, more and nextCursor for the in-memory history buffer.

Testcases:

No testcase defined.