You can query the DATABASES system table to find out the last time your Vertica database started and you can get the cluster node up times by querying the NODE_STATES system table.
Example:
dbadmin=> SELECT database_name, start_time
dbadmin-> FROM databases;
database_name | start_time
---------------+-------------------------------
test_db | 2018-09-06 14:33:07.301363-04
(1 row)
dbadmin=> SELECT node_name, MAX(event_timestamp) node_uptime
dbadmin-> FROM node_states
dbadmin-> WHERE node_state = 'UP'
dbadmin-> GROUP BY node_name
dbadmin-> ORDER BY node_name;
node_name | node_uptime
--------------------+-------------------------------
v_test_db_node0001 | 2018-09-06 14:33:07.248692-04
v_test_db_node0002 | 2018-09-06 14:33:07.26675-04
v_test_db_node0003 | 2018-09-06 14:33:07.243385-04
(3 rows)
Typically your cluster nodes will have the same uptime as the database, unless you had to restart one of the nodes later.
Example:
dbadmin=> SELECT local_node_name();
local_node_name
--------------------
v_test_db_node0001
(1 row)
dbadmin=> SELECT restart_this_node();
server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.
!> \q
[dbadmin@vertica01 ~]$ vsql
Welcome to vsql, the Vertica Analytic Database interactive terminal.
Type: \h or \? for help with vsql commands
\g or terminate with semicolon to execute query
\q to quit
dbadmin=> SELECT node_name, MAX(event_timestamp) node_uptime
dbadmin-> FROM node_states
dbadmin-> WHERE node_state = 'UP'
dbadmin-> GROUP BY node_name
dbadmin-> ORDER BY node_name;
node_name | node_uptime
--------------------+-------------------------------
v_test_db_node0001 | 2018-09-10 09:52:26.76466-04
v_test_db_node0002 | 2018-09-06 14:33:07.26675-04
v_test_db_node0003 | 2018-09-06 14:33:07.243385-04
(3 rows)
Helpful links:
https://my.vertica.com/docs/9.1.x/HTML/index.htm#Authoring/SQLReferenceManual/SystemTables/CATALOG/DATABASES.htm
https://my.vertica.com/docs/9.1.x/HTML/index.htm#Authoring/SQLReferenceManual/SystemTables/MONITOR/NODE_STATES.htm
Have fun!
