Added delayed scripts that are executed with minimal time drift to avoid all scripts to be executed at the same time and thus cause load spikes

scripts/callbacks/hourly-delayed/system/system_checks.lua

@@ -0,0 +1,30 @@
+--
+-- (C) 2019-22 - ntop.org
+--
+
+local dirs = ntop.getDirs()
+package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
+
+local checks = require "checks"
+
+-- #################################################################
+-- Just like for local_network_checks.lua, here periodic system 
+-- checks are executed with the right granularity
+-- #################################################################
+
+local checks_var = {
+   ifid = nil,
+   system_ts_enabled = nil,
+   system_config = nil,
+   available_modules = nil,
+   configset = nil,
+   do_benchmark = false,
+   do_print_benchmark = false
+}
+
+local granularity = "hour"
+local do_trace = false
+
+-- #################################################################
+
+checks.systemChecks(granularity, checks_var, do_trace)