The alarm-side budget for Drupal's own cron: how much of cronStep() to run per firing.
Owns no transport, alarm or env, so a spec can drive it. A firing stops at the first of
maxUnits, maxRows (rows written is the meter that binds regeneration) and maxMs
(a wall-clock loop bound, not a CPU figure). At most one PHP unit runs per firing: mayContinue
is true only for a SQL unit or a skip, so cron never holds the isolate while a visitor waits.
The alarm-side budget for Drupal's own cron: how much of
cronStep()to run per firing.Owns no transport, alarm or env, so a spec can drive it. A firing stops at the first of
maxUnits,maxRows(rows written is the meter that binds regeneration) andmaxMs(a wall-clock loop bound, not a CPU figure). At most one PHP unit runs per firing:mayContinueis true only for a SQL unit or a skip, so cron never holds the isolate while a visitor waits.