A malfunction in the number of queries caused by the site and a load on the database

[urivil]

Greetings,
In recent weeks, users have been constantly complaining to me about the appalling slowness of the site. Today it also collapsed for a few hours.
The server says that this is caused by the multiplicity and load of queries that burden the MYSQL. Screenshot attached.
I'm having trouble understanding what suddenly happened to this problem, and I'm desperate to find a solution.
Would appreciate help

| 132999 | toraforu_xf211122 | localhost | toraforu_xf211122 | Prepare | 404 |...
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A malfunction in the number of queries caused by the site and a load on the database

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