add reset or overflow detection in percentage-of-incremental-total dimensions - like...

diff --git a/src/rrd.c b/src/rrd.c
index 2b310d1ad37040ec0b7247d60becb5107f5519bf..6abcf6586a9b87eadbf68ac82c413a967d21c0f2 100644 (file)
--- a/src/rrd.c
+++ b/src/rrd.c
@@ -1049,6 +1049,17 @@ unsigned long long rrdset_done(RRDSET *st)
                                        continue;
                                }
 
+                               // if the new is smaller than the old (an overflow, or reset), set the old equal to the new
+                               // to reset the calculation (it will give zero as the calculation for this second)
+                               if(unlikely(rd->last_collected_value > rd->collected_value)) {
+                                       debug(D_RRD_STATS, "%s.%s: RESET or OVERFLOW. Last collected value = " COLLECTED_NUMBER_FORMAT ", current = " COLLECTED_NUMBER_FORMAT
+                                       , st->name, rd->name
+                                       , rd->last_collected_value
+                                       , rd->collected_value);
+                                       if(!(rd->flags & RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS)) storage_flags = SN_EXISTS_RESET;
+                                       rd->last_collected_value = rd->collected_value;
+                               }
+
                                // the percentage of the current increment
                                // over the increment of all dimensions together
                                if(unlikely(st->collected_total == st->last_collected_total))