Hello 

My server hosts have notified me of the following issue:

As you can see below, there are multiple concurrent queries for the same query parameters (same 'user_id' search), and each query takes over 2 seconds. I want to understand why this happening (there should only be 1 query, not multiple queries with the same parameters), 

Time: 2019-03-04T04:52:02.323104Z

User@Host: wp_nrlsctalk[wp_nrlsctalk] @ localhost [] Id: 5903

Query_time: 2.102812 Lock_time: 0.000050 Rows_sent: 0 Rows_examined: 142515

SET timestamp=1551675122;
SELECT comment_ID FROM wp_comments WHERE comment_type = 'private' AND comment_parent = 0 AND user_id = 46057;

Time: 2019-03-04T04:52:02.384026Z

User@Host: wp_nrlsctalk[wp_nrlsctalk] @ localhost [] Id: 5907

Query_time: 2.205697 Lock_time: 0.000049 Rows_sent: 0 Rows_examined: 142515

SET timestamp=1551675122;
SELECT comment_ID FROM wp_comments WHERE comment_type = 'private' AND comment_parent = 0 AND user_id = 46057;

Time: 2019-03-04T04:52:02.455034Z

User@Host: wp_nrlsctalk[wp_nrlsctalk] @ localhost [] Id: 5905

Query_time: 2.196140 Lock_time: 0.000056 Rows_sent: 0 Rows_examined: 142515

SET timestamp=1551675122;
SELECT comment_ID FROM wp_comments WHERE comment_type = 'private' AND comment_parent = 0 AND user_id = 46057;

Time: 2019-03-04T04:52:02.457939Z

User@Host: wp_nrlsctalk[wp_nrlsctalk] @ localhost [] Id: 5904

Query_time: 2.419714 Lock_time: 0.000049 Rows_sent: 0 Rows_examined: 142515

SET timestamp=1551675122;
SELECT comment_ID FROM wp_comments WHERE comment_type = 'private' AND comment_parent = 0 AND user_id = 46057;