I'm writing this post because the forum I manage is experiencing serious lag issues. Navigation during these last days has been mostly normal, but it has occasionally been slow loading the website. The biggest issue so far has been posting, as posts take up to 10 seconds to appear. You can see this in the attached video. In fact, many times the post doesn't even appear to be posted thought it has, and users constantly click on "Post" again and the post appears twice.
This has been happening for approximately 2 weeks. I've checked the hard drive and we're at 50% of the capacity, which should be OK. Memory and CPU load are also fine. From the hosting side it appears to be no problem.
I don't know if an addon might be the cause of the posts being posted so slowly. I don't really know what is going on, but I would need a solution, because my users are obviously having troubles with this and complaining.
I hope you can help. Thanks in advance.