Hi
For last 2 months i created a lot of dashboards on Splunk.
In most of my searchs i need to get only the last series of results.
I see i use 2 methods, both work well, but i would know which one is more optimized.
Sometimes I use
search|dedup MyField sortby -_time|table MyField aField bField
and sometimes I use
search|stats latest(aField),latest(bField) by MyField
What is the best to use for short periods/long periods?
In a distributed environment, stats is likely to be faster, because the indexers can "prestats" before sending their results to the search head. I think that dedup may do a little of this, but the notable distinction is that dedup can't be used with report acceleration searches. I tend to use stats for this purpose.
I would think that dedup
should be slightly faster, but not by a big margin. Best way to find out is to use the Job Inspector for the searches and look for yourself. It's far more important to limit the initial search, i.e. what comes before the first pipe. Specifying correct index, host, sourcetype
and time-limits will have far more effect on the search performance.
However, your dedup
syntax looks a bit off, shouldn't it be sortby
instead of by
?
http://docs.splunk.com/Documentation/Splunk/latest/SearchReference/Dedup
http://docs.splunk.com/Documentation/Splunk/latest/Search/UsingtheSearchJobInspector
/K
Ure right for dedup, i wrote all from mind so mistakes 🙂