Search for	Example	Results
A single word	`cat`	Topics that contain the word "cat". You will also find its grammatical variations, such as "cats".
A phrase. You can specify that the search results contain a specific phrase.	`"cat food"` (quotation marks)	Topics that contain the literal phrase "cat food" and all its grammatical variations. Without the quotation marks, the query is equivalent to specifying an OR operator, which finds topics with one of the individual words instead of the phrase.

Search for	Operator	Example
Two or more words in the same topic	`AND` `and` `+` (plus symbol) `&` (ampersand)	`cat AND dog` `"cat food"+milk` `"cat food"&"dog food"`
Either word in a topic	`OR` `or` `\|` (pipe)	`cat OR dog` `cat \| dog`
Topics that do not contain a specific word or phrase	`NOT` `not` `!` (exclamation point)	`NOT cat` `! dog`
Topics that contain one string and do not contain another	`^` (caret)	`cat ^ mouse`
A combination of search types	`( )` parentheses	`cat + (dog \| mouse)` `cat \| dog + (! mouse)`

Service Management2017.11

Administer > Database administration > Data persistence > IR Expert > IR keys and non-IR keys > Multiple files containing IR keys

Multiple files containing IR keys

The current release of ITSMA Service Management uses shared memory, and does not specify a practical limit on the number of files that can contain IR keys. The system caches the most frequently referenced data, making the number of files that have IR keys less of an issue.

Using multiple fields within the IR keys causes no real impact to IR performance. Service Management takes all fields defined as part of the IR key and concatenates them for IR processing. It takes more time to concatenate five fields than two fields, but the difference is negligible. Multiple files with IR keys compete for use of the shared memory cache. You should allocate more shared memory as you increase the number of files with IR keys.

Consider using the Knowledge Base that enables you to store all corporate knowledge data into a single file (core) for IR processing.

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