摘要:本篇教程探讨了SQLServer数据库入门之数据库表碎片比例查询语句,希望阅读本篇文章以后大家有所收获,帮助大家对相关内容的理解更加深入。
本篇教程探讨了SQLServer数据库入门之数据库表碎片比例查询语句,希望阅读本篇文章以后大家有所收获,帮助大家对相关内容的理解更加深入。
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For rebuilding index, here is also a script to figure out the fragmentation and decide whether rebuilding index is in need:
use [database_name]
SELECT dbschemas.[name] as 'Schema',
dbtables.[name] as 'Table',
dbindexes.[name] as 'Index',
indexstats.avg_fragmentation_in_percent,
indexstats.page_count
FROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL, NULL, NULL) AS indexstats
INNER JOIN sys.tables dbtables on dbtables.[object_id] = indexstats.[object_id]
INNER JOIN sys.schemas dbschemas on dbtables.[schema_id] = dbschemas.[schema_id]
INNER JOIN sys.indexes AS dbindexes ON dbindexes.[object_id] = indexstats.[object_id]
AND indexstats.index_id = dbindexes.index_id
WHERE indexstats.database_id = DB_ID()
ORDER BY indexstats.avg_fragmentation_in_percent desc
When the avg_fragmentation_in_percent >30, please rebuild the index (alter index rebuild). If the 5 < avg_fragmentation_in_percent < 30, please reorgnize the index (alter index reorganize)
However, as you mentioned that it finished quickly, maybe you can manage it before you run the job each time. Just arrange it as the preparation for you job. Please update statistics each time you want to run the job.
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