Which allows us to group events into a single transaction and allows us to work with that transaction, and lastly we looked into rex which allows us to apply regular expressions on events and extract fields. We started by looking at append and appendcols which allow us to construct a query made from multiple queries, we then looked into transaction Today we looked at Splunk commands which are commonly used to extract information from logs. To be used with moderation, as on top of coupling the message itself, we couple the exact amount of characters. Here we want to match price"=123 and extract 123, so we look for price in _raw and match the next two character "= and extract a group named price which we can then use. corId | transaction corId startswith = " Received Request " endswith = " Completed Request " | rex field = _raw " price.(?*) " | table corId, price ) to match single characters easily in an event.įor example if our transaction contains multiple events but not all the properties are understood by Splunk, we can use rex to extract pieces of the events using _raw which contains the raw grouping of events. This is useful when the message log doesn’t have a clear way of extracting values.Īs logs are predictable, a nice trick to extract data can be built done using dots (. Although youre thinking of the the transaction as being aggregated as time moves forward, the command experiences time in the other direction, we start from the more recent. Lastly rex can be used to extract groups of values out of events to be used in queries. Reposting as an answer: Yes, this is an idiosyncrasy in the implementation of the transaction command in the search language. This query will group all events between Received Request and CompletedRequest with the same corId and extract price and region out of the group of events and then timechart the maximum price per region in a span of five minutes, limit=0 disable the limit of split so that we can see all regions. region | timechart limit = 0 span = 5 m max ( price ) by region ![]() price | spath output = region path = properties. corId | transaction corId startswith = " Received Request " endswith = " Completed Request " | spath output = price path = properties. | spath output = corId path = properties.
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