collect active processes limit feature v2 (#9843)

* Add VARIABLE of pid_max to active_processes chart to use on alarms

* use function for pid_max and use a single alarm

* fix in alarm

1 files changed, 7 insertions, 0 deletions

diff --git a/collectors/proc.plugin/proc_loadavg.c b/collectors/proc.plugin/proc_loadavg.c
index db95b16891..8b78ecc9ef 100644
--- a/collectors/proc.plugin/proc_loadavg.c
+++ b/collectors/proc.plugin/proc_loadavg.c
@@ -46,6 +46,10 @@ int do_proc_loadavg(int update_every, usec_t dt) {
 
     //unsigned long long running_processes  = str2ull(procfile_lineword(ff, 0, 3));
     unsigned long long active_processes     = str2ull(procfile_lineword(ff, 0, 4));
+    
+    //get system pid_max
+    unsigned long long max_processes        = get_system_pid_max();
+    //
     //unsigned long long next_pid           = str2ull(procfile_lineword(ff, 0, 5));
 
 
@@ -95,6 +99,7 @@ int do_proc_loadavg(int update_every, usec_t dt) {
     if(likely(do_all_processes)) {
         static RRDSET *processes_chart = NULL;
         static RRDDIM *rd_active = NULL;
+        static RRDSETVAR *rd_pidmax;
 
         if(unlikely(!processes_chart)) {
             processes_chart = rrdset_create_localhost(
@@ -113,10 +118,12 @@ int do_proc_loadavg(int update_every, usec_t dt) {
             );
 
             rd_active = rrddim_add(processes_chart, "active", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
+            rd_pidmax = rrdsetvar_custom_chart_variable_create(processes_chart, "pidmax");
         }
         else rrdset_next(processes_chart);
 
         rrddim_set_by_pointer(processes_chart, rd_active, active_processes);
+        rrdsetvar_custom_chart_variable_set(rd_pidmax, max_processes);
         rrdset_done(processes_chart);
     }