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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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Categories

SCRIPTS 53 SQL SERVER MAINTENANCE 11 SQL SERVER ADMINISTRATION 10 SQL SERVER MONITORING 8 SQL SERVER PERFORMANCE 8 SQL SERVER BACKUP RECOVERY 7 SQL SERVER STRUCTURE 6 SQL SERVER SECURITY 3

Series

SQL SERVER MAINTENANCE 11 SQL SERVER ADMINISTRATION 9 SQL SERVER MONITORING 8 SQL SERVER PERFORMANCE 8 SQL SERVER BACKUP RECOVERY 7 SQL SERVER STRUCTURE 6 SQL SERVER SECURITY 3 ADMIN-GUIDE 1

Tags

SQL SERVER 52 DATABASE ADMINISTRATION 39 SQL SCRIPTS 39 MAINTENANCE SCRIPTS 18 PERFORMANCE 15 DATABASE MAINTENANCE 12 SYS.TABLES 12 DBCC COMMANDS 11 SYS.DATABASES 10 SYSOBJECTS 10 DBA SCRIPTS 9 MONITORING 9 SYS.OBJECTS 9 MSDB 8
All Tags
ACTIVE SESSIONS2 ADMINISTRATION2 ALTER INDEX1 AUTOMATION2 BACKUP1 BACKUP AUDIT1 BACKUP COMPRESSION1 BACKUP MONITORING2 BACKUP RECOVERY6 BACKUP VALIDATION1 BACKUPSET1 BLOCKING2 BOTTLENECK ANALYSIS1 CAPACITY PLANNING2 CLUSTERED INDEXES1 COLUMNS1 CONSISTENCY CHECKS2 CONSTRAINT REPORTING1 CONTENTION1 COPY ONLY BACKUP1 CPU CONFIGURATION1 CPU HISTORY1 CPU UTILIZATION1 CURSOR PROGRAMMING1 DATA TYPES1 DATABASE1 DATABASE ADMINISTRATION39 DATABASE CONNECTIONS1 DATABASE CORRUPTION1 DATABASE FILES1 DATABASE INTEGRITY1 DATABASE MAINTENANCE12 DATABASE MANAGEMENT3 DATABASE MONITORING2 DATABASE OBJECTS1 DATABASE OPTIMIZATION1 DATABASE SCRIPTS1 DATABASE SECURITY1 DATABASE STRUCTURE4 DBA SCRIPTS9 DBA TOOLS1 DBCC1 DBCC CHECKDB3 DBCC CHECKIDENT2 DBCC COMMANDS11 DBCC DBINFO1 DBCC DBREINDEX2 DBCC FREEPROCCACHE1 DBCC LOGINFO1 DBCC SHRINKFILE2 DEPENDENCIES1 DEV RESTORE1 DIAGNOSTICS1 DIFFERENTIAL BACKUP1 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 DUPLICATE INDEXES1 DYNAMIC SQL2 ERROR LOG1 EXECUTION PLAN1 FILEPROPERTY1 FOREIGN KEYS2 FRAGMENTATION2 FULL BACKUP1 GRANT STATEMENTS1 HEAP TABLES2 IDENTITY COLUMNS2 IDENTITY RESEED1 IMPACT ANALYSIS1 INDEX FRAGMENTATION2 INDEX MAINTENANCE4 INDEX OPTIMIZATION1 INDEX REBUILDING1 INDEX SIZE1 INDEX TUNING2 INDEXES4 INDEXING1 INFORMATION_SCHEMA.TABLE_CONSTRAINTS1 INFORMATION_SCHEMA.TABLES1 INTEGRITY CHECK1 JOB MONITORING1 KILL SPID1 LOG MANAGEMENT1 LOGIN MANAGEMENT1 MAINTENANCE SCRIPTS18 MAX SERVER MEMORY1 MAXDOP1 MEMORY CONFIGURATION1 METADATA1 MISSING INDEXES1 MONITORING9 MSDB8 MSDB.DBO.BACKUPMEDIAFAMILY1 MSDB.DBO.BACKUPSET1 NONCLUSTERED INDEXES1 NUMA1 OBJECT DEPENDENCIES1 OBJECT SEARCH1 OPEN TRANSACTIONS1 OPTIMIZATION2 ORPHAN USERS1 PARAMETER SNIFFING1 PERFORMANCE15 PERFORMANCE MONITORING1 PERFORMANCE TUNING7 PERMISSIONS2 PLAN CACHE2 POINT IN TIME RESTORE1 PRIMARY KEYS2 QUERY OPTIMIZATION2 QUERY PERFORMANCE1 QUERY TUNING3 REBUILD REORGANIZE1 RECOVERY1 REFACTORING1 REFERENTIAL INTEGRITY1 REPORTING3 RESTORE1 RESTORE VERIFYONLY1 RING BUFFER1 ROLE MEMBERSHIPS1 SCHEMA ANALYSIS2 SCHEMA AUDIT1 SCHEMA DOCUMENTATION1 SCHEMA MANAGEMENT1 SCRIPTS3 SECURITY3 SECURITY AUDIT2 SERVER MONITORING1 SESSION MANAGEMENT1 SP CONFIGURE1 SP_CHANGE_USERS_LOGIN1 SP_CONFIGURE2 SP_PKEYS1 SP_READERRORLOG1 SP_SPACEUSED1 SPACE MANAGEMENT1 SPACE USAGE1 SQL1 SQL SCRIPTS39 SQL SERVER52 SQL SERVER AGENT1 SQL SERVER MONITORING1 SQLSERVER PROCESS UTILIZATION1 STATISTICS1 STORAGE2 STORED PROCEDURES1 SYS.ALL_COLUMNS1 SYS.ALL_OBJECTS1 SYS.ALLOCATION_UNITS2 SYS.COLUMNS4 SYS.COMPUTED_COLUMNS1 SYS.CONFIGURATIONS1 SYS.DATABASE_FILES2 SYS.DATABASE_PERMISSIONS1 SYS.DATABASE_PRINCIPALS2 SYS.DATABASE_ROLE_MEMBERS1 SYS.DATABASES10 SYS.DM_DB_INDEX_PHYSICAL_STATS7 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_STATS1 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_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_KEYS3 SYS.IDENTITY_COLUMNS1 SYS.INDEX_COLUMNS2 SYS.INDEXES7 SYS.KEY_CONSTRAINTS1 SYS.MASTER_FILES2 SYS.OBJECTS9 SYS.PARTITIONS3 SYS.SCHEMAS2 SYS.SERVER_PRINCIPALS1 SYS.SP_ENUMERRORLOGS1 SYS.SQL_EXPRESSION_DEPENDENCIES1 SYS.SQL_MODULES1 SYS.TABLES12 SYS.TYPES1 SYS.VIEWS1 SYSCOLUMNS1 SYSDATABASES1 SYSINDEXES2 SYSJOBHISTORY1 SYSJOBS1 SYSOBJECTS10 SYSTEM IDLE PROCESS1 SYSTEM TABLES3 T-SQL3 TABLE ANALYSIS1 TABLE MAINTENANCE1 TABLE SIZE1 TABLE STATISTICS1 TEMPDB1 TRANSACTION LOG2 TRANSACTION LOG BACKUP1 UPDATE STATISTICS1 VIEWS1 VIRTUAL LOG FILES1 WAIT STATISTICS1 WAIT TYPES3 XP_READERRORLOG1
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