Only the Post Timesheets job has been increasing in runtime.
Run the following query to review the runtimes:
select n.created_date, n.created_by, n.receiver_id, n.sender_id, n.last_updated_date, n.localized_message, csu.user_name, csu.first_name, csu.last_name
FROM
CLB_NOTIFICATIONS N,
CMN_SEC_USERS CSU
where CSU.id = N.RECEIVER_ID
and N.CREATED_DATE > sysdate-30
--and n.receiver_id = <user_id>
and n.localized_message like '%Post Timesheets%'
order by N.CREATED_DATE desc
Clarity
Oracle
Have the DBA team review and apply SQL Tuning Advisor.