high "connection management call elapsed time"

Statistic Name Time (s) % of DB Time

connection management call elapsed time 4,666.75 19.05

This in awr report (10 mins), I find OMS launches 3812 connection times.

Elapsed Time (s) Executions Elapsed Time per Exec (s) %Total %CPU %IO SQL Id SQL      Module      SQL Text

536.23           3,812                0.14                                    2.19          3.21 0.01 3r3nmx18apvn3 OMS      BEGIN restrict_logon_pkg.screen_logon; end;

518.91           3,805                0.14                                    2.12           0.24 0.01 8vz9nm0akvgz5 OMS      MERGE INTO Restrict_LOGON_Log

In our system, we have a trigger, each login will run restrict_logon_pkg.screen_logon, and record the login information or failed login into table restrict_login_log. Why OMS launch 3812 connections in 10 minutes? In awr report, sometimes it about more than 4000. Is anyway to reduce this?