Steps to stop the database in Vertica

• 1. Check the status of each node to ensure that no node is down

select * from nodes;

• 2. Set the maximum number of sessions

=> SELECT CURRENT_VALUE FROM CONFIGURATION_PARAMETERS WHERE parameter_name='MaxClientSessions';
  CURRENT_VALUE
---------------
 50
(1 row)
ALTER DATABASE mydb SET MaxClientSessions = 0;

• 3. Close all sessions

select * from sessions;
SELECT CLOSE_ALL_SESSIONS();

• 4. Open admintools and stop the library
• 5. The maximum number of conversations to reply after the operation is completed

ALTER DATABASE CSAP SET MaxClientSessions = 50;

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