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  • SQL Server DBCC FREEPROCCACHE: Clear the Plan Cache Safely

    calendar Jun 6, 2026 / Jun 8, 2026 · 6 min read · sql server plan cache query performance parameter sniffing performance tuning database administration sql scripts dbcc commands DBCC FREEPROCCACHE sys.dm_exec_cached_plans sys.dm_exec_sql_text  ·
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    A stored procedure that returned in 20 milliseconds yesterday is timing out today, and nothing in the code changed. The data did not grow meaningfully, the indexes are intact, and statistics look current — yet the query is suddenly scanning a million rows it used to seek. The usual culprit is a cached execution plan …


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  • SQL Server Long-Running Queries: Find Active Sessions

    calendar Apr 12, 2026 / Jun 2, 2026 · 6 min read · sql server performance monitoring sql scripts sys.dm_exec_requests sys.dm_exec_sql_text blocking wait types database administration active sessions  ·
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    Find Active Long-Running Queries in SQL Server This script queries sys.dm_exec_requests and sys.dm_exec_sql_text to show all currently executing queries on the SQL Server instance, sorted by how long they have been running, along with CPU time, I/O activity, blocking status, and wait type information. Purpose and …


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  • SQL Server Top Queries by CPU and IO: dm_exec_query_stats

    calendar Apr 4, 2026 / Jun 2, 2026 · 6 min read · sql server performance sql scripts sys.dm_exec_query_stats sys.dm_exec_sql_text sys.dm_exec_query_plan query tuning database administration monitoring execution plan  ·
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    Find the Top CPU and IO Consuming Queries in SQL Server This script queries sys.dm_exec_query_stats to identify the most resource-intensive queries currently cached in the plan cache, showing logical reads, writes, CPU time, and elapsed time — with the full query text and execution plan for each. Purpose and Overview …


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  • SQL Server Blocking Detection: Find Blocked Sessions

    calendar Mar 1, 2026 / Jun 2, 2026 · 5 min read · sql server blocking performance dm exec requests dm exec sessions wait types dba scripts monitoring query tuning sys.databases sys.dm_exec_requests sys.dm_exec_sessions sys.dm_exec_sql_text sys.dm_tran_locks  ·
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    Blocking in SQL Server occurs when one session holds a lock that another session needs, causing the second session to wait. This T-SQL script queries the dynamic management views to show all currently blocked sessions, the blocking session, wait type, wait duration, and the SQL text involved. Purpose and Overview When …


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Categories

SCRIPTS 65 SQL SERVER MAINTENANCE 14 SQL SERVER ADMINISTRATION 12 SQL SERVER STRUCTURE 11 SQL SERVER PERFORMANCE 10 SQL SERVER MONITORING 8 SQL SERVER BACKUP RECOVERY 7 SQL SERVER SECURITY 3

Series

SQL SERVER MAINTENANCE 14 SQL SERVER ADMINISTRATION 12 SQL SERVER STRUCTURE 11 SQL SERVER PERFORMANCE 10 SQL SERVER MONITORING 8 SQL SERVER BACKUP RECOVERY 7 SQL SERVER SECURITY 3

Tags

SQL SERVER 64 DATABASE ADMINISTRATION 39 SQL SCRIPTS 39 MAINTENANCE SCRIPTS 19 PERFORMANCE 18 SYS.TABLES 16 SCRIPTS 15 SYS.OBJECTS 15 DATABASE MAINTENANCE 13 DBCC COMMANDS 11 MONITORING 11 SYS.DATABASES 11 MSDB 10 SYS.INDEXES 10
All Tags
ACTIVE SESSIONS2 ADMINISTRATION4 ALTER INDEX1 ANSI STANDARD1 AUTOMATION2 BACKUP1 BACKUP AUDIT1 BACKUP COMPRESSION1 BACKUP MONITORING2 BACKUP RECOVERY6 BACKUP VALIDATION1 BACKUPSET1 BLOCKING2 BOTTLENECK ANALYSIS1 BUFFER POOL1 CAPACITY PLANNING2 CARDINALITY ESTIMATION1 CATALOG VIEWS6 CLUSTERED INDEXES1 COLUMNS1 COMPATIBILITY VIEWS1 CONSISTENCY CHECKS2 CONSTRAINT REPORTING1 CONTENTION1 COPY ONLY BACKUP1 CPU CONFIGURATION1 CPU HISTORY1 CPU UTILIZATION1 CROSS DATABASE1 CURSOR PROGRAMMING1 DATA AUDIT1 DATA CACHE1 DATA COMPRESSION1 DATA DICTIONARY1 DATA TYPES1 DATABASE1 DATABASE ADMINISTRATION39 DATABASE CONNECTIONS1 DATABASE CORRUPTION2 DATABASE FILES2 DATABASE INTEGRITY1 DATABASE MAIL1 DATABASE MAINTENANCE13 DATABASE MANAGEMENT3 DATABASE MEMORY1 DATABASE MONITORING2 DATABASE OBJECTS1 DATABASE OPTIMIZATION1 DATABASE SCHEMA1 DATABASE SCRIPTS1 DATABASE SECURITY1 DATABASE STRUCTURE9 DBA SCRIPTS9 DBA TOOLS1 DBCC1 DBCC CHECKDB4 DBCC CHECKIDENT2 DBCC COMMANDS11 DBCC DBINFO1 DBCC DBREINDEX2 DBCC FREEPROCCACHE1 DBCC LOGINFO1 DBCC SHRINKFILE2 DEPENDENCIES1 DEV RESTORE1 DIAGNOSTICS1 DIFFERENTIAL BACKUP1 DISK IO1 DISK LATENCY1 DISK SPACE2 DM DB MISSING INDEX DETAILS1 DM DB MISSING INDEX GROUP STATS1 DM DB SESSION SPACE USAGE1 DM EXEC REQUESTS2 DM EXEC SESSIONS3 DM EXEC SQL TEXT1 DM OS WAIT STATS1 DMV2 DOCUMENTATION1 DUPLICATE INDEXES1 DYNAMIC SQL3 ERROR LOG1 EXECUTION PLAN1 FILEPROPERTY1 FOR SYSTEM_TIME1 FOREIGN KEYS2 FRAGMENTATION2 FULL BACKUP1 GRANT STATEMENTS1 HEAP TABLES2 HISTORY TABLE1 IDENTITY COLUMNS2 IDENTITY RESEED1 IMPACT ANALYSIS1 INDEX FRAGMENTATION2 INDEX MAINTENANCE5 INDEX OPTIMIZATION1 INDEX REBUILDING1 INDEX SIZE1 INDEX TUNING2 INDEXES4 INDEXING1 INFORMATION_SCHEMA2 INFORMATION_SCHEMA.TABLE_CONSTRAINTS1 INFORMATION_SCHEMA.TABLES1 INTEGRITY CHECK2 IO STALL1 JOB MONITORING1 KILL SPID1 LOG MANAGEMENT1 LOGIN MANAGEMENT1 MAINTENANCE2 MAINTENANCE SCRIPTS19 MAX SERVER MEMORY1 MAXDOP1 MEMORY1 MEMORY CONFIGURATION1 METADATA7 MISSING INDEXES1 MONITORING11 MSDB10 MSDB.DBO.BACKUPMEDIAFAMILY1 MSDB.DBO.BACKUPSET1 NONCLUSTERED INDEXES1 NUMA1 OBJECT DEPENDENCIES1 OBJECT SEARCH1 OPEN TRANSACTIONS1 OPTIMIZATION2 ORPHAN USERS1 PAGE COMPRESSION1 PAGE CORRUPTION1 PARAMETER SNIFFING1 PERFORMANCE18 PERFORMANCE MONITORING1 PERFORMANCE TUNING7 PERMISSIONS2 PLAN CACHE2 POINT IN TIME QUERY1 POINT IN TIME RESTORE1 PRIMARY KEYS3 QUERY OPTIMIZATION2 QUERY OPTIMIZER1 QUERY PERFORMANCE1 QUERY TUNING3 REBUILD REORGANIZE1 RECOVERY1 REFACTORING1 REFERENTIAL INTEGRITY1 REPORTING3 RESTORE1 RESTORE VERIFYONLY1 RING BUFFER1 ROLE MEMBERSHIPS1 ROW COMPRESSION1 SCHEMA ANALYSIS2 SCHEMA AUDIT1 SCHEMA DOCUMENTATION1 SCHEMA MANAGEMENT1 SCRIPTS15 SECURITY3 SECURITY AUDIT2 SERVER MONITORING1 SESSION MANAGEMENT1 SP CONFIGURE1 SP_CHANGE_USERS_LOGIN1 SP_CONFIGURE2 SP_EXECUTESQL1 SP_PKEYS2 SP_READERRORLOG1 SP_SEND_DBMAIL1 SP_SPACEUSED1 SP_UPDATESTATS1 SPACE MANAGEMENT1 SPACE USAGE1 SQL1 SQL SCRIPTS39 SQL SERVER64 SQL SERVER AGENT2 SQL SERVER MONITORING1 SQLSERVER PROCESS UTILIZATION1 STATISTICS2 STORAGE2 STORAGE ERROR1 STORED PROCEDURES1 SUSPECT PAGES1 SYS.ALL_COLUMNS1 SYS.ALL_OBJECTS1 SYS.ALLOCATION_UNITS3 SYS.COLUMNS7 SYS.COMPUTED_COLUMNS1 SYS.CONFIGURATIONS1 SYS.DATABASE_FILES2 SYS.DATABASE_PERMISSIONS1 SYS.DATABASE_PRINCIPALS2 SYS.DATABASE_ROLE_MEMBERS1 SYS.DATABASES11 SYS.DM_DB_INDEX_PHYSICAL_STATS8 SYS.DM_DB_INDEX_USAGE_STATS5 SYS.DM_DB_MISSING_INDEX_DETAILS1 SYS.DM_DB_MISSING_INDEX_GROUP_STATS1 SYS.DM_DB_MISSING_INDEX_GROUPS1 SYS.DM_DB_PARTITION_STATS2 SYS.DM_DB_STATS_PROPERTIES1 SYS.DM_EXEC_CACHED_PLANS1 SYS.DM_EXEC_QUERY_PLAN1 SYS.DM_EXEC_QUERY_STATS1 SYS.DM_EXEC_REQUESTS2 SYS.DM_EXEC_SESSIONS2 SYS.DM_EXEC_SQL_TEXT4 SYS.DM_IO_VIRTUAL_FILE_STATS1 SYS.DM_OS_BUFFER_DESCRIPTORS1 SYS.DM_OS_PERFORMANCE_COUNTERS1 SYS.DM_OS_RING_BUFFERS1 SYS.DM_OS_SYS_INFO1 SYS.DM_OS_VOLUME_STATS1 SYS.DM_OS_WAIT_STATS1 SYS.DM_OS_WAITING_TASKS1 SYS.DM_SQL_REFERENCED_ENTITIES1 SYS.DM_SQL_REFERENCING_ENTITIES1 SYS.DM_TRAN_ACTIVE_TRANSACTIONS1 SYS.DM_TRAN_LOCKS1 SYS.FOREIGN_KEY_COLUMNS1 SYS.FOREIGN_KEYS4 SYS.IDENTITY_COLUMNS1 SYS.INDEX_COLUMNS5 SYS.INDEXES10 SYS.KEY_CONSTRAINTS2 SYS.MASTER_FILES3 SYS.OBJECTS15 SYS.PARTITIONS6 SYS.SCHEMAS7 SYS.SERVER_PRINCIPALS1 SYS.SP_ENUMERRORLOGS1 SYS.SQL_EXPRESSION_DEPENDENCIES1 SYS.SQL_MODULES2 SYS.STATS1 SYS.TABLES16 SYS.TYPES2 SYS.VIEWS1 SYSCOLUMNS1 SYSDATABASES1 SYSINDEXES3 SYSJOBHISTORY1 SYSJOBS1 SYSMAIL_ACCOUNT1 SYSMAIL_ADD_ACCOUNT_SP1 SYSMAIL_EVENT_LOG1 SYSMAIL_MAILITEMS1 SYSMAIL_PROFILE1 SYSOBJECTS10 SYSTEM IDLE PROCESS1 SYSTEM TABLES4 SYSTEM VERSIONING1 T-SQL3 TABLE ANALYSIS1 TABLE INVENTORY1 TABLE MAINTENANCE1 TABLE SIZE1 TABLE STATISTICS1 TEMPDB1 TEMPORAL TABLES1 TRANSACTION LOG2 TRANSACTION LOG BACKUP1 UPDATE STATISTICS2 VIEWS1 VIRTUAL LOG FILES1 WAIT STATISTICS1 WAIT TYPES3 XP_READERRORLOG1
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