9/22/2023 0 Comments Splunk search contains![]() To get an idea of the terms present in a specific index, you can use the walklex command. However, you should be careful, as this would not return an event where the IP address was preceded by a minor breaker, such as “ip=192.168.1.1” – you’d need to add TERM(ip=192.168.1.1) to your search. ![]() By searching for TERM(192.168.1.1), Splunk will only return the events with that exact IP address in them. If your data contains several IP addresses that include one of those terms, Splunk will return all of them. For example, if you search for an IP address like 192.168.1.1 without the TERM command, Splunk will split that into several terms at the period (a minor breaker) and look for each of those. Splunk will then look at the specific buckets indicated by the time range and index you specify, and then scan the tsidx for the terms in your search, returning any event that matches any of those terms.īy using the TERM command, you can tell Splunk to find a string that includes minor breakers, provided it is surrounded by major breakers. becomes com idelta name and and Minor breakersĪ space, a new line, a carriage return, a tab, and the following symbols: ( ) | ! , ‘ ” *.“ERROR HttpListener – Exception while processing request” becomes ERROR Exception HttpListener processing request while.When you search, Splunk takes everything in your search up to the first pipe and splits it into unique terms using major and minor breakers. Splunk stores your data in buckets based on their index and timestamp and keeps track of the contents using a tsidx file, a time-series index that lists each unique term in your data and tells Splunk where to find it amongst the raw data. Understanding why TERM() is so important requires a bit of an explanation of how Splunk works, so bear with me for a few minutes. This is one of the most powerful ways you can improve search times in Splunk, but not many people know about it. If you start a search term with *, it will search for everything, which is obviously going to be time-consuming. A wildcard in the middle of a string will return inconsistent and inaccurate results, especially if it contains punctuation. You can use wildcards (*) in your searches, but make sure that they only replace the end of a string. If you know that the keyword you are searching for appears in a certain field, search for field=keyword in order to make the search more efficient. More search terms before the first pipe means that Splunk needs to return fewer events to you, speeding the process up. ![]() This is a time-consuming part of the process, and you should aim to return only the events you need. Splunk will return any event that includes any of the terms that appear before the first pipeline in your search. The most important thing to be specific about is the index and time-range of your search – avoid searching index=* or doing all-time searches. If your Splunk searches are taking a long time to run, here are simple things you can do to improve them. Search performance is key to an efficient Splunk environment – no one wants to be waiting around forever waiting for search results to load.
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