- RAPID RECOVERY POWERSHELL AGENT HOW TO
- RAPID RECOVERY POWERSHELL AGENT FULL
- RAPID RECOVERY POWERSHELL AGENT SERIES
RAPID RECOVERY POWERSHELL AGENT FULL
When the recovery model of the database is FULL or Bulk-Logged, which is the default recovery model of all newly created databases, unless you change the recovery model setting in the model system database, the inactive part of the SQL Server Transaction Log file that is waiting for truncation will not be truncated automatically unless a Transaction Log backup is performed on that database to explicitly truncate that part of the log. In all cases, reorganizing an index with a specific size requires less log space than rebuilding the same index.
You can imagine the SQL Transaction Log space that is required to reorganize a large index that is heavily fragmented. The index reorganizes operation is always fully logged, regardless of the recovery model setting of the database. The case in the index reorganizes operation is not the same. If the recovery model of the database is changed to Simple or Bulk-Logged, the index rebuild operation will be a minimally logging operation. It runs by default in a single long-running transaction, that prevents the Transaction Log space reuse while rebuilding a large index. SQL Server index rebuild operation is a fully logged operations that use the Transaction Log excessively, especially when the recovery model of the database is FULL. And if the auto-growth option is enabled, the underlying disk drive will run out of free space.īefore going through the mechanisms that can be used to monitor and manage SQL Server Transaction Log growth, let us discuss the excessive logging operations that may lead the SQL Transaction Log file to grow rapidly and the operations that lock the transaction and prevent it from being reused by other transactions. In the heavily transactional systems with excessive logging operations, the SQL Server Transaction Log file will grow rapidly, until it reaches its maximum size, generating error number 9002. The SQL Server Database Engine writes a log record for every single operation in the database, that includes starting or ending a SQL transaction when a data modification process is performed, when a database table or index is created or dropped, and after each page allocation or deallocation operation.
RAPID RECOVERY POWERSHELL AGENT HOW TO
In this article, we will see how to monitor the SQL Server Transaction Log growth and how to manage that growth. In addition, we discussed deeply the three Full, Simple and Bulk-Logged recovery models of the database, that specifies how these transactions will be logged and saved to the SQL Server transaction log file. This is achieved by writing a log record to the SQL transaction log file before writing the data pages to the physical data file, using Write-ahead Logging process. It also helps to recover the database to a specific point in time in case of system or hardware failure.
RAPID RECOVERY POWERSHELL AGENT SERIES
In the previous articles of this series on the SQL Server Transaction Log, we discussed the importance of the SQL Server Transaction Log and the role that it plays in maintaining the database consistency, by ensuring that the committing transactions data will be preserved and the failed transaction will be rolled back.