Hi,
Did reconfigure MPM solve your issue ? I am also trying to solve performance issues as seen below :
# Time: 2022-06-30T09:37:01.525638Z
# User@Host: rt_user[rt_user] @ localhost [] Id: 81
# Query_time: 45.004797 Lock_time: 0.000000 Rows_sent: 0 Rows_examined: 0
use rt5;
SET timestamp=1656581821;
SELECT GET_LOCK('Apache-Session-c85779d1776f9efeee5039679aa2707f', 3600);
# Time: 2022-06-30T09:37:26.095161Z
# User@Host: rt_user[rt_user] @ localhost [] Id: 73
# Query_time: 45.004341 Lock_time: 0.000000 Rows_sent: 0 Rows_examined: 0
SET timestamp=1656581846;
SELECT GET_LOCK('Apache-Session-c85779d1776f9efeee5039679aa2707f', 3600);
# Time: 2022-06-30T09:38:06.133459Z
# User@Host: rt_user[rt_user] @ localhost [] Id: 79
# Query_time: 46.006014 Lock_time: 0.000000 Rows_sent: 0 Rows_examined: 0
SET timestamp=1656581886;
SELECT GET_LOCK('Apache-Session-c85779d1776f9efeee5039679aa2707f', 3600);
# Time: 2022-06-30T09:39:05.922497Z
# User@Host: rt_user[rt_user] @ localhost [] Id: 89
# Query_time: 46.004733 Lock_time: 0.000000 Rows_sent: 0 Rows_examined: 0
SET timestamp=1656581945;
SELECT GET_LOCK('Apache-Session-c85779d1776f9efeee5039679aa2707f', 3600);
# Time: 2022-06-30T09:41:17.569549Z
# User@Host: rt_user[rt_user] @ localhost [] Id: 85
# Query_time: 43.008185 Lock_time: 0.000000 Rows_sent: 0 Rows_examined: 0
SET timestamp=1656582077;
SELECT GET_LOCK('Apache-Session-c85779d1776f9efeee5039679aa2707f', 3600);