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Difference between revisions of "MS SQL"
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→Commands and Maintenance: Added "Show database recovery modes"
(→Fragmentation: Added "Rebuild All Indexes") |
m (→Commands and Maintenance: Added "Show database recovery modes") |
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#* Delete all historical data (backup/restore, SQL Server Agent and Maintenance plan histories) | #* Delete all historical data (backup/restore, SQL Server Agent and Maintenance plan histories) | ||
#* Older than 2 weeks | #* Older than 2 weeks | ||
# '''Back Up Database Task''' | |||
#* Backup type: Full | |||
#* Databases: All databases | |||
#* Backup will expire: Leave unticked | |||
#* Create a backup file for every database: Update as appropriate | |||
# '''Reorganise Index Task''' | # '''Reorganise Index Task''' | ||
#* All user databases | #* All user databases | ||
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#* Update: All existing statistics | #* Update: All existing statistics | ||
#* Scan type: Full scan | #* Scan type: Full scan | ||
# '''Maintenance Cleanup Task''' | # '''Maintenance Cleanup Task''' | ||
#* Delete files of the following type: Backup files | #* Delete files of the following type: Backup files | ||
#* File extension: <code>bak</code> | #* File extension: <code>bak</code> | ||
#* File age: Select as appropriate | #* File age: Select as appropriate | ||
Be aware rhat the '''Reorganise Index Task''' can cause lots of activity to be generated in the transaction log, therefore if your recovery mode is ''Full'' (rather than ''Simple''), the transaction log can grow large very quickly. If performing on a database that's been running for some time this can be an issue. Consider setting the recovery mode to ''Simple'' for the first run, or perform at a time when if your transaction log fills you can recover without too much disruption to applications using the database. | |||
=== Hourly Transaction Log Backup === | === Hourly Transaction Log Backup === | ||
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== Commands and Maintenance == | == Commands and Maintenance == | ||
For performance issues, see http://www.sqlskills.com/blogs/paul/wait-statistics-or-please-tell-me-where-it-hurts/ | |||
Crib sheet of some very basic stuff, the syntax isn't exactly the same, but see also [[MySQL]] | Crib sheet of some very basic stuff, the syntax isn't exactly the same, but see also [[MySQL]] | ||
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EXECUTE sp_who2; /* Show current processes */ | EXECUTE sp_who2; /* Show current processes */ | ||
SELECT name,log_reuse_wait_desc FROM sys.databases; /* Show why transaction log can't grow */ | SELECT name,log_reuse_wait_desc FROM sys.databases; /* Show why transaction log can't grow */ | ||
SELECT name,recovery_model_desc FROM sys.databases ORDER BY name /* Show database recovery modes */ | |||
</source> | </source> | ||
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=== Database Sizes === | === Database Sizes === | ||
Use the following in order to find the sizes of databases on your server. | |||
<source lang="sql"> | <source lang="sql"> | ||
SELECT | SELECT | ||
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Source: http://stackoverflow.com/questions/5945360/sql-server-2008-how-to-query-all-databases-sizes | Source: http://stackoverflow.com/questions/5945360/sql-server-2008-how-to-query-all-databases-sizes | ||
=== Table Sizes === | |||
Replace '''DatabaseName''' in the query below | |||
<source lang="sql"> | |||
USE <DataBaseName> | |||
SELECT | |||
t.NAME AS TableName, | |||
i.name as indexName, | |||
sum(p.rows) as RowCounts, | |||
sum(a.total_pages) as TotalPages, | |||
sum(a.used_pages) as UsedPages, | |||
sum(a.data_pages) as DataPages, | |||
(sum(a.total_pages) * 8) / 1024 as TotalSpaceMB, | |||
(sum(a.used_pages) * 8) / 1024 as UsedSpaceMB, | |||
(sum(a.data_pages) * 8) / 1024 as DataSpaceMB | |||
FROM | |||
sys.tables t | |||
INNER JOIN | |||
sys.indexes i ON t.OBJECT_ID = i.object_id | |||
INNER JOIN | |||
sys.partitions p ON i.object_id = p.OBJECT_ID AND i.index_id = p.index_id | |||
INNER JOIN | |||
sys.allocation_units a ON p.partition_id = a.container_id | |||
WHERE | |||
t.NAME NOT LIKE 'dt%' AND | |||
i.OBJECT_ID > 255 AND | |||
i.index_id <= 1 | |||
GROUP BY | |||
t.NAME, i.object_id, i.index_id, i.name | |||
ORDER BY | |||
object_name(i.object_id) | |||
</source> | |||
Source: https://stackoverflow.com/questions/2094436/how-to-find-largest-objects-in-a-sql-server-database | |||
=== Memory Usage === | === Memory Usage === | ||
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==== Rebuild All Indexes ==== | ==== Rebuild All Indexes ==== | ||
Unless you are running SQL Enterprise, this needs to be run when your database is ''' | Unless you are running SQL Enterprise, this needs to be run when your database is '''single-user mode'''. | ||
<source lang="sql"> | <source lang="sql"> | ||
USE DatabaseName /* Change to database name! */ | USE DatabaseName /* Change to database name! */ | ||
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DEALLOCATE TableCursor | DEALLOCATE TableCursor | ||
</source> | |||
To put into Single-User Mode | |||
# Take database offline | |||
#* If database won't stop, look for processes still accessing the database and kill them | |||
# Put into single-user mode | |||
# Put database online | |||
#* You can only run commands from one console window/connection | |||
<source lang="sql"> | |||
/* Find processes and kill them*/ | |||
exec sp_who2 | |||
kill 32 | |||
/* Force offline - change database name */ | |||
USE master | |||
ALTER DATABASE DatabaseName SET OFFLINE WITH ROLLBACK IMMEDIATE | |||
/* Force into single-user */ | |||
USE master | |||
ALTER DATABASE DatabaseName SET SINGLE_USER WITH ROLLBACK IMMEDIATE | |||
/* Put back into multi-user */ | |||
USE master | |||
ALTER DATABASE DatabaseName SET MULTI_USER | |||
</source> | </source> | ||
[[Category:Applications]] | [[Category:Applications]] | ||
[[Category:Microsoft]] | [[Category:Microsoft]] | ||