28 lines
913 B
MySQL
28 lines
913 B
MySQL
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-- diagnostic des index fragment<6E>s
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SELECT * FROM sys.dm_db_index_physical_stats(NULL, NULL, NULL, NULL, NULL)
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WHERE avg_fragmentation_in_percent > 10
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AND page_count>64
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-- ALTER INDEX .... REORGANIZE --> pas bloquant mais pas top
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-- ALTER INDEX .... REBUILD --> bloquant mais top (peut <20>tre non bloquant si ed. Enterprise et mode ONLINE)
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-- diagnostic des index inutilis<69>s
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-- !!!!!!!!!!!!!!!!!!!!!!!!! ATTENTION : ne pas utiliser si moins de 30 jours de fonctionnement CONTINU du SGBDR
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SELECT sqlserver_start_time FROM sys.dm_os_sys_info
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SELECT *
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FROM sys.dm_db_index_usage_stats
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WHERE index_id > 1
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ORDER BY user_seeks, user_lookups, user_scans, user_updates DESC
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-- recalcul des statistiques
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SELECT *
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FROM sys.stats AS s
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CROSS APPLY sys.dm_db_stats_properties(s.object_id, s.stats_id)
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WHERE modification_counter > rows / 10
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UPDATE STATISTICS .... WITH FULLSCAN
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