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What is the use of log file in database recovery?
The log records in the log buffer and in the log file are used to undo the changes of the failed transaction in reverse order. System (crash) recovery is needed when the whole database (transaction) system fails, e.g., due to a hardware or software error.
What is log and how is it maintained?
The log is a sequence of log records, recording all the update activities in the database. In a stable storage, logs for each transaction are maintained. Any operation which is performed on the database is recorded is on the log.
How long is database stuck in recovery mode?
Recovery of database ‘DatabaseName’ (9) is 0% complete (approximately 95 seconds remain). Phase 1 of 3. This is an informational message only. No user action is required. Recovery of database ‘DatabaseName’ (9) is 3% complete (approximately 90 seconds remain).
What are the messages on the SQL Server Error log?
Jan 15 2019 01:23 PM You must be very familiar with the database recovery related messages printed to the SQL Server Error log. These come in very handy when troubleshooting issues that are related to long recovery. These messages provide information about the stage of the recovery process and approximate time for completion.
Why is MY SQL database still in recovery?
Your DB might still be under recovery state, as SQL databases undergo three phases of recovery, which can take time depending on your database files’ size. Usually, when the database is not shut down properly on SQL Server restart, it undergoes crash recovery, ensuring that the DB remains consistent.
Where can I find the progress of database recovery?
Most of the information is readily available in the dynamic management views [DMV]. The 2 DMV’s that offer insights into the progress of database recovery are: sys.dm_exec_requests and sys.dm_tran_database_transactions.