|Component||Checks & Agents|
|Title||mk_logwatch: optimize regex search|
|Checkmk Edition||Checkmk Raw Edition (CRE)|
|Compatibility||Compatible - no manual interaction needed|
For regular expressions in a logwatch section leading or trailing '.*' portions can be a performance desaster. With long log lines, it can virtually render your system paralyzed. If you are not using any rewrite patterns though, you can omit leading and trailing '.*' expressions without changing the set of matched lines.
mk_logwatch now detects those cases, and will optimize the patterns accordingly.