LogViewPlus Support » LogViewPlus Support » Help & Support » Extremely Slow Performance when opening a log with extremely long lines

Extremely Slow Performance when opening a log with extremely long lines

dshunter — Wed, 18 Jan 2023 18:42:25 GMT

Hi
New user here. Enjoying the tool so far.
Our system went wrong, and was outputting a log file of 100MB, spread over very few (around 50) exceptionally long log lines (upstream system was sending us bad data).
LogViewPlus is unable to handle such a file gracefully, taking around 20 minutes to open it, and 20 mins per click after that.
A single CPU seems to be pinned to 100%. Memory is only around 200MB.
Seems like it is trying to do some unnecessary processing of this line... would be good if it could truncate it somehow to keep it usable so we can diagnose the problem.

RE: Extremely Slow Performance when opening a log with extremely long lines

LogViewPlus Support — Wed, 18 Jan 2023 18:42:25 GMT

Glad that is working for you - thanks for letting me know!

We have now released LogViewPlus v3.0.4 as a BETA release. This release addresses the issue discussed above by disabling default syntax highlighting for large messages.

Thanks again for bringing this issue to our attention. Please do let me know if you have any further questions or issues.

Toby

RE: Extremely Slow Performance when opening a log with extremely long lines

dshunter — Wed, 18 Jan 2023 11:26:11 GMT

Version 3.0.2
128GB (70% free) RAM/Intel XeonGold 6128 CPU @ 3.40GHz 3.39 GHz
So a decent spec'ed desktop.
Disabling syntax highlighting works great thanks!

RE: Extremely Slow Performance when opening a log with extremely long lines

LogViewPlus Support — Wed, 18 Jan 2023 09:01:06 GMT

Just a quick update on this. I am not sure if the issue I have highlighted above is the same issue you are having. However, the issue highlighted is a problem. I have corrected this by disabling default syntax highlighting for large messages. This fix will be available in the v3.0.4 BETA release which should be available from downloads later today.

In the meantime, you can test if this is the issue you are having by disabling syntax highlighting as described above.

Hope that helps,

Toby

RE: Extremely Slow Performance when opening a log with extremely long lines

LogViewPlus Support — Tue, 17 Jan 2023 18:52:25 GMT

Also, what version of LogViewPlus are you using? If you disable syntax highlighting, does that improve performance?

RE: Extremely Slow Performance when opening a log with extremely long lines

LogViewPlus Support — Tue, 17 Jan 2023 16:50:08 GMT

Hi,

Thanks for reporting this issue.

How much available memory does the machine have?

I just tried to recreate this issue locally with a 125 MB file with 192 log entries - 64 of which are very large. Performance is pretty good with the exception of selecting large log entries which takes 5-6 seconds to display. During this time, a a loading message is displayed:

Clicking elsewhere in the application is not a problem. The file loaded quickly.

I am on a powerful machine (dev spec). Could this be the same issue?

Thanks again,

Toby