Thanks for your inputs @swong_splunk . I was trying somethings as below with outlier however it is not working as it should . index="_internal" source="/opt/splunk/var/log/splunk/metrics.log" group=per_index_thruput series=** splunk_server=* earliest=-61m@m latest=-1m@m |rename series as index| eval GB=kb/(1024*1024) | bin _time span=1m | stats sum(GB) as size by _time index
| streamstats avg("size") as avg stdev("size") as stdev by "index"
| eval lowerBound=(avg-stdev*exact(3)), upperBound=(avg+stdev*exact(3))
| eval isOutlier=if('size' < lowerBound OR 'size' > upperBound, 1, 0) |eval
time=strftime(_time, "%m/%d/%y %I:%M:%S:%p")| fields index time size
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