Question Aborted connection occurs frequently

[Zoo3]

When I look at mysqld.log, the following error warning almost every 5-6 minutes.
`[Warning] Aborted connection XXXXX to db: 'psa' user: 'admin' host: 'localhost' (Got timeout reading communication packets)`

"psa" is Plesk, right? How can this be fixed?
I ran the Plesk repair command or reboot server, but it hasn't improved.

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Plesk Obsibian 18.0.24, MariaDB 10.2.31

 

[IgorG]

`[Warning] Aborted connection XXXXX to db: 'psa' user: 'admin' host: 'localhost' (Got timeout reading communication packets)`

Please look at this KB article Database importing hangs in Plesk: Got an error reading communication packets
I hope it will help.

 

[Zoo3]

Please look at this KB article Database importing hangs in Plesk: Got an error reading communication packets
I hope it will help.

> innodb_buffer_pool_size=1024M
> query_cache_size=64M

I was optimizing MariaDB with an app called mysqltuner.pl. Did I believe it too much?
I'm adjusting the above two items, but this Warning does not stop even if I set the value of the above twice (2048M or 128M).