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For information about how to work with SQL Server counters, see Use SQL Server Objects. The Backup/Restore Throughput/sec counter of the SQLServer:Databases objectįor information about Windows counters, see Windows help. The Device Throughput Bytes/sec counter of the SQLServer:Backup Device object Windows I/O performance counters, such as the physical-disk counters To obtain a good picture of your backup I/O performance, you can isolate the backup I/O to or from devices by evaluating the following sorts of performance counters: For more information, see Use Resource Governor to Limit CPU Usage by Backup Compression (Transact-SQL).īeginning with SQL Server 2022 (16.x) Preview, you can use Integrated offloading & acceleration to compress backups and offload the CPU resources for the backup.
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Therefore, you might want to create low-priority compressed backups in a session whose CPU usage is limited by Resource Governor. Performance impact of compressing backupsīy default, compression significantly increases CPU usage, and the additional CPU consumed by the compression process might adversely impact concurrent operations.
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NTbackups cannot share a tape with compressed SQL Server backups. Previous versions of SQL Server cannot read compressed backups. The following restrictions apply to compressed backups:Ĭompressed and uncompressed backups cannot co-exist in a media set. Benefitsīecause a compressed backup is smaller than an uncompressed backup of the same data, compressing a backup typically requires less device I/O and therefore usually increases backup speed significantly.įor more information, see Performance Impact of Compressing Backups, later in this article. Every edition of SQL Server 2008 and later can restore a compressed backup. Backup compression is supported on SQL Server editions: Enterprise, Standard, and Developer. This article describes the compression of SQL Server backups, including restrictions, performance trade-off of compressing backups, the configuration of backup compression, and the compression ratio.