Bug 485232

SUMMARY
Often logs are very hard to read or analyze and large in size because of many repetitive errors. It would be extremely useful to have a GUI tool that combines repetitive messages with just a counter.

For example, here https://unix.stackexchange.com/q/773986/233262 I had many "kded5: HistoryFile::add.write […]" errors cluttering the journalctl logs and this happens very often for many different log entries.

It also allows showing which error messages repeat very often which are often linked to current problems or are of a particular severity.

It wouldn't only combine repetitive log entries that are output directly in a row but also the same error messages within the specified time. One could for example toggle a button like "Combine repetitive messages" and show them at the top of the logviewer with a counter next to them sorted by number of occurrences where all messages that are shown in the current view are "compressed" like that. Another way could be to then show an option to set start and endtime for where logs should be combined and/or a button next to log-entries like "combine all messages identical to this".

STEPS TO REPRODUCE
1. On Debian12/KDE try to debug a problem by using journalctl that has lots of repetitive messages, sometimes thousands of the same messages in a row or within a relatively short timespan

OBSERVED RESULT
Each repetitive message is shown individually making the log very long which is only useful for seeing the timestamp or when investigating a timespan shorter than what is currently viewed where these log entries could be missing if they were shown at the top

EXPECTED RESULT
A way to combine repetitive identical messages. Maybe in the future it could also be possible to combine nearly identical messages and to complement this by temporarily hiding errors from various sources/types.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Debian 12
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8

ADDITIONAL INFORMATION

This is a very useful underrated tool which has a lot of potential but needs some more work to become so useful to be really used a lot.