topic Re: Creating a table with common columns for multiple fields in Splunk Search

Creating a table with common columns for multiple fields

jamesklassen — Fri, 25 Mar 2011 23:49:09 GMT

I have performance data captured with Splunk with fields and data like this:

DatabaseCachePercentHit=0
DatabaseCacheSizeMB=22839
DatabasePageFaultStallsPersec=0
DatabasePageFaultsPersec=0
IODatabaseReadsAttachedAverageLatency=0
IODatabaseReadsRecoveryAverageLatency=0
ComputerName=MAIL1S1

I need to turn this into a table with the columns: Name,Latest,Max(last 24h),Average

How can I use stats to create the same columns for these different fields? And group them each into a row?

Re: Creating a table with common columns for multiple fields

southeringtonp — Sat, 26 Mar 2011 08:26:14 GMT

Here's one approach.

For simplicity, this assumes that your max is calculated over the same time period as your reporting range. It pulls everything into field values rather than field names, since stats and most other transformative commands want to operate against values:

sourcetype=whatever
| rex field=_raw max_match=10 "(?<kvpair>\w+=\d+)"
| mvexpand kvpair
| rex field=kvpair "(?<key>\w+)=(?<value>\d+)"
| stats first(value) as "Latest" max(value) as "Max" avg(value) as "Average" by host,key
| sort host,key

If your intent was to have the 'Max' value for only the last 24 hours, regardless of the overall search time window, you can mask out the older values:

...
| eval todayvalue=if(now()-86400<_time, todayvalue, null)
| stats first(value) as "Latest" max(todayvalue) as "24h Max" avg(value) as "Average" by host,key

Re: Creating a table with common columns for multiple fields

jamesklassen — Sat, 02 Apr 2011 03:29:00 GMT

This works perfectly, exactly what I wanted. Thank you.