Events_errors_... SUM_ERROR_RAISED increasing on changing schema

MySQL & MariaDB Percona XtraDB Cluster 8.x
1

I noticed that on my application user events_errors_summary_by_user_by_error became very big and increasing by 800 every second.
select * from performance_schema.events_errors_summary_by_user_by_error
where error_name=‘ER_NO_SYSTEM_TABLE_ACCESS’
and user=‘XXXXXXXXX’;
now reached SUM_ERROR_RAISED=396,197,800

How to find out why?

I tested with my user and notice this on changing schema.
39 erorrs every time i change schema? But no warnings or errors when I am doing that.

select * from performance_schema.events_errors_summary_by_user_by_error
where error_name='ER_NO_SYSTEM_TABLE_ACCESS' 
and user='dev-mm';
+--------+--------------+---------------------------+-----------+------------------+-------------------+---------------------+---------------------+
| USER   | ERROR_NUMBER | ERROR_NAME                | SQL_STATE | SUM_ERROR_RAISED | SUM_ERROR_HANDLED | FIRST_SEEN          | LAST_SEEN           |
+--------+--------------+---------------------------+-----------+------------------+-------------------+---------------------+---------------------+
| dev-mm |         3554 | ER_NO_SYSTEM_TABLE_ACCESS | HY000     |            26321 |                 0 | 2024-01-31 08:29:25 | 2024-02-12 14:19:30 |
+--------+--------------+---------------------------+-----------+------------------+-------------------+---------------------+---------------------+
1 row in set (0.0341 sec)

 SQL > use performance_schema;
Default schema set to `performance_schema`.
Fetching global names, object names from `performance_schema` for auto-completion... Press ^C to stop.

select * from performance_schema.events_errors_summary_by_user_by_error
where error_name='ER_NO_SYSTEM_TABLE_ACCESS' 
and user='dev-mm';
+--------+--------------+---------------------------+-----------+------------------+-------------------+---------------------+---------------------+
| USER   | ERROR_NUMBER | ERROR_NAME                | SQL_STATE | SUM_ERROR_RAISED | SUM_ERROR_HANDLED | FIRST_SEEN          | LAST_SEEN           |
+--------+--------------+---------------------------+-----------+------------------+-------------------+---------------------+---------------------+
| dev-mm |         3554 | ER_NO_SYSTEM_TABLE_ACCESS | HY000     |            26360 |                 0 | 2024-01-31 08:29:25 | 2024-02-12 14:23:00 |
+--------+--------------+---------------------------+-----------+------------------+-------------------+---------------------+---------------------+
1 row in set (0.0282 sec)

 SQL > use performance_schema;
Default schema set to `performance_schema`.
Fetching global names, object names from `performance_schema` for auto-completion... Press ^C to stop.

select * from performance_schema.events_errors_summary_by_user_by_error
where error_name='ER_NO_SYSTEM_TABLE_ACCESS' 
and user='dev-mm';
+--------+--------------+---------------------------+-----------+------------------+-------------------+---------------------+---------------------+
| USER   | ERROR_NUMBER | ERROR_NAME                | SQL_STATE | SUM_ERROR_RAISED | SUM_ERROR_HANDLED | FIRST_SEEN          | LAST_SEEN           |
+--------+--------------+---------------------------+-----------+------------------+-------------------+---------------------+---------------------+
| dev-mm |         3554 | ER_NO_SYSTEM_TABLE_ACCESS | HY000     |            26399 |                 0 | 2024-01-31 08:29:25 | 2024-02-12 14:28:44 |
+--------+--------------+---------------------------+-----------+------------------+-------------------+---------------------+---------------------+
1 row in set (0.0163 sec)

WHY???

I have all priveleges created with:
grant all PRIVILEGES on *.* to 'dev-mm'@'%' with grant option;

2

I find out that if I connected from localhost, ‘use performance_schema;’ did not increase SUM_ERROR_RAISED counter. Error counter is increasing if I am connecting through mysqlsh client. So looks like this is not pure mysql and grants problem, but something myssqlsh is cheking in backgroud.

3

Ok. This is not percona, this is some mysql problem:

mysql> select SUM_ERROR_RAISED from performance_schema.events_errors_summary_by_user_by_error
    -> where error_name='ER_NO_SYSTEM_TABLE_ACCESS'
    -> and user in('dev-mm') and SUM_ERROR_RAISED > 0 and last_seen > now() - INTERVAL 30 DAY;
+------------------+
| SUM_ERROR_RAISED |
+------------------+
|             5719 |
+------------------+
1 row in set (0.02 sec)

mysql> SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE<>'BASE TABLE' AND TABLE_SCHEMA='performance_schema';
Empty set (0.00 sec)

mysql> select SUM_ERROR_RAISED from performance_schema.events_errors_summary_by_user_by_error
    -> where error_name='ER_NO_SYSTEM_TABLE_ACCESS'
    -> and user in('dev-mm') and SUM_ERROR_RAISED > 0 and last_seen > now() - INTERVAL 30 DAY;
+------------------+
| SUM_ERROR_RAISED |
+------------------+
|             5725 |
+------------------+
1 row in set (0.02 sec)