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Old Jun 17, 2019   #11
Smaguris
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This is still an issue btw, quite an annoying one..
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Old Jun 17, 2019   #12
Tuna
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Sir is looking into it, although a fix or a cause still hasn't been found afaik.
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Old Jun 17, 2019   #13
-sir
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That's something that apparently only affects regular users and not staff members.
Yes, we've been looking into it (actually for a while now), but we still don't have any clue why this happens or what causes it.
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Old Jun 18, 2019   #14
Tuna
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Odd, so that would imply that it's an issue stemming from usergroups. I guess one way to troubleshoot would be to look into when the issue first started happening, has anything been changed. Do any vb mods depends on usergroups that may be malfunctioning or out of date... It's very strange that it only occurs periodically though.
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Old Sep 3, 2019   #15
Smaguris
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This has been extremely prevalent recently, happens on almost every post I make.

I've done a bit of digging around and apparently this issue is as old as vBulletin itself, however there are many factors that can cause an issue like this.
Posting messages is the most resource intensive function of vBulletin. When you post a new message it must:

1. Censor the text in the message if necessary.
2. Convert all HTML entities to their proper notation if necessary.
3. Index each and every unique word in the post. (word and searchindex tables)
4. Send all email notifications out. (subscribedthread table)
5. Send all Moderator mail notifications out. (moderator table)
6. Update the thread information. (thread table)
7. Update the forum information. (forum table)
8. Update the user information. (user table)
9. Actually save the thread. (post table)

When you look at it like that, it is probably possible to look at individual processes on server side and pinpoint the source of this issue.

Most other forums that had this issue pinpointed it as a sendmail problem, so that could be main area to inspect if it hasn't been looked at yet.

Source: https://forum.vbulletin.com/forum/vb...mitting-a-post
-----
One more thing I would like to add that is probably important: As you know first the page defaults to duplicate posts error. If you then quickly go back to the thread, your post actually won't be there no matter how many times you refresh, however, if you wait around 15 more seconds only then will the post show up. This means that the post is being delayed on server side even after the initial delay on client side.

Furthermore, when you post consecutively (like i did now) the delay is different. Instead of defaulting you to another page, it simply makes around 15 sec delay and then updates the post as normal.

Just trying to give as much information as possible. I would encourage other users to give all the info you notice as well as devs can't troubleshoot this themselves.

Last edited by Smaguris; Sep 3, 2019 at 05:00 PM.. Reason: <24 hour edit/bump
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Old Sep 6, 2019   #16
Tuna
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This forum now has 20,545,784 posts. That's surely going to put a lot of load on database searches and updates.

The forums need a spring cleaning. It's possible to optimise it for a better user experience.
For example attachments and images should be moved to the file system, vb stores them in the database by default. Guests should have a highly reduced version of the forums, we currently have 360 guests that a majority of which are bots, this takes up bandwidth better served to actual users.

We might be doing this already, but if not we should serve all CSS and JavaScript from a CDN, perhaps even an IMG CDN would go a far way.
This would involve renting another server.

I'd imagine that posting issues could be caused by malfunctioning Asynchronous JavaScript and XML (AJAX).
AJAX is a very important part of optimising the server load.

To check this, an admin would go to AdminCP > Maintenance > Diagnostics > Problematic Webserver Modules

If any of the AJAX modules are misbehaving then that would certainly be a high priority avenue to go up. As AJAX primarily deals with quick replies etc.
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Last edited by Tuna; Sep 6, 2019 at 03:02 PM..
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