6/9/2023 0 Comments Oracle database startup timeIf there is something wrong with database I see this in logs, but I have to wait 2-5 minutes. The application takes 2-5 minutes to start. The startup history is listed from the latest to the oldest one. How to know historical information of Instance startup time (Doc ID 2095732.1) Last updated on JANUApplies to: Oracle Database - Enterprise Edition - Version 10.2.0. For our application we have a configuration file for connecting to the Oracle database (URL, username, password). SQL> select startup_time open_time from dba_hist_database_instance order by 1 desc To view all startup history of the database, we may extend the above query. If you found the difference of your case is only a few seconds, this is very normal for starting a database from idle to completely open. SQL> select max(startup_time) open_time from dba_hist_database_instance Īs you can see, the database open time was lagged about 10 minutes behind the instance startup time in this case. Here we wait for about 10 minutes, then open the database. Database Startup Timeįor database, the startup time is actually the open time. We always require to check the periodic daemon for a PMON or SMON process.The startup time and shutdown time are written in the alert logs. It's the same except the state is MOUNT now. The startuptime field from vinstance view provides the time at which databases was started. ![]() SQL> select status, startup_time from v$instance Answer: Startup information is stored in vinstance.startuptime, and uptime can be easily computed as sysdate - startuptime, but shutdown data is problematic. oraenv ORACLESID oracle orcl The Oracle base has been set to /scratch/u01/app/oracle Log in to SQLPlus as the SYSDBA user. Execute the oraenv command to set the environment variables. SQL> select status, startup_time from v$instance To shut down and restart the database instance, perform the following steps: Open a terminal window as the oracle user. SQL> alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss' To check instance startup time, here we can query the instance under NOMOUNT state.įirst of all, we format the date time of current session. ![]() Additionally, we also check the startup history of the database in the last section of this post. Oracle has so many functions like sysdate.To check Oracle database startup or restart time, we have to know the difference between instance startup time and database open time. So the question is you require to calculate the uptime. SELECT database_name as “DB_Name”, to_char(logon_time,’DD/MM/YYYY HH24:MI:SS’) FROM v$session WHERE sid=1 Select database_name as “DB_Name”,TO_CHAR(logon_time,’DD-MMM-YYYY HH24:MI:SS’) from V$Session where program like ‘ %PMON%’ SELECT INSTANCE_NAME as “Name_of_Instance”,TO_CHAR(STARTUP_TIME, ‘HH24:MI DD-MMM-YY’) as “Database_Startup_History” FROM DBA_HIST_DATABASE_INSTANCE ORDER BY STARTUP_TIME DESC You can check the startup history as well using following query, Select instance_name as “Database_name”,to_char(startup_time,’dd-mm-yyyy hh24:mi:ss’) as “The_Startup_Time” from v$instance We need to utilize the v$instance system view to get the historical information about the database in detail.You will get the startup information from following query , Question is- Is there any database views which will give you the information about the database history? ![]() We require to create a report which will give us the information about system uptime and start-time.We require to fetch the database history information and create a report. SQL> alter database open Database altered. Real life industry scenario for How to check database uptime? Database Startup Time For database, the startup time is actually the open time. In this article i would like to give you the basic idea about – How to check database uptime? I would like to give multiple important queries for getting answer of the important interview question – How to check database uptime? Initially the oracle system tables and views will help us finding the correct up-time for the oracle database. The below query gives the output of the last 10 start times of the database along with the timezone in Oracle, Click here for. Sometimes we have to find when the database is started with which timezone especially when the database is getting rebooted unknowingly in Oracle. In my previous articles i have given many answers about how to related to oracle and sql server as well. The last 10 startup times of the database along with timezone in Oracle.
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