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  • SQL Server Long-Running Queries: Find Active Sessions

    calendar Apr 12, 2026 / Oct 14, 2026 · 7 min read · sql server performance monitoring sql scripts sys.dm_exec_requests sys.dm_exec_sql_text blocking wait types database administration active sessions sys.dm_exec_connections sys.dm_exec_sessions  ·
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    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 Overview A query that normally completes in seconds …


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  • SQL Server Blocking Detection: Find Blocked Sessions

    calendar Mar 1, 2026 / Oct 12, 2026 · 10 min read · sql server blocking performance dm exec requests dm exec sessions wait types dba scripts monitoring query tuning head blocker sys.databases sys.dm_exec_requests sys.dm_exec_sessions sys.dm_exec_connections sys.dm_exec_sql_text sys.dm_tran_locks  ·
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    Blocking happens when one session holds a lock that another session needs, so the second session waits. The query below lists every request that is waiting on another session right now: who is blocked, who is blocking, the wait type and wait time, the database, and the SQL text on both sides. Purpose and Overview The …


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Recent Posts

  • Spot Low-Memory Conditions with sys.dm_os_process_memory
  • Profile Costly Cached Procs with sys.dm_exec_procedure_stats
  • Check AG Replica Health with sys.dm_hadr_availability_replica_states
  • Decode PLE and Buffer Cache Hit Ratio via cntr_type Codes
  • Audit Server Configuration Drift with sys.configurations
  • Find Ad Hoc Plan Cache Bloat with sys.dm_exec_cached_plans
  • Age Open Transactions with sys.dm_tran_active_transactions
  • Rank Expensive Queries with sys.query_store_runtime_stats

Categories

SCRIPTS 77 SQL SERVER ADMINISTRATION 14 SQL SERVER MAINTENANCE 14 SQL SERVER PERFORMANCE 14 SQL SERVER MONITORING 11 SQL SERVER STRUCTURE 11 SQL SERVER BACKUP RECOVERY 10 SQL SERVER SECURITY 3

Series

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

Tags

SQL SERVER 76 DATABASE ADMINISTRATION 40 SQL SCRIPTS 40 SCRIPTS 25 PERFORMANCE 21 MAINTENANCE SCRIPTS 20 SYS.OBJECTS 19 MONITORING 18 SYS.TABLES 17 SYS.DATABASES 15 DATABASE MAINTENANCE 14 SYS.INDEXES 12 DBCC COMMANDS 11 DBA SCRIPTS 10
All Tags
ACTIVE SESSIONS2 AD HOC QUERIES1 ADMINISTRATION4 ADVANCED OPTIONS1 ALTER INDEX1 ALWAYS ON1 ANSI STANDARD1 AUTOMATION3 BACKUP3 BACKUP AUDIT1 BACKUP COMPRESSION1 BACKUP MONITORING2 BACKUP RECOVERY8 BACKUP VALIDATION1 BACKUPSET1 BLOCKING3 BOTTLENECK ANALYSIS1 BUFFER CACHE HIT RATIO1 BUFFER MANAGER1 BUFFER POOL2 CAPACITY PLANNING2 CARDINALITY ESTIMATION1 CATALOG VIEWS7 CLUSTERED INDEXES1 CNTR_TYPE1 COLUMNS1 COMPATIBILITY VIEWS1 COMPILED PLAN STUB1 CONFIGURATION DRIFT1 CONSISTENCY CHECKS2 CONSTRAINT REPORTING1 CONTENTION1 COPY ONLY BACKUP1 CPU CONFIGURATION1 CPU HISTORY1 CPU TIME1 CPU UTILIZATION1 CROSS DATABASE1 CURSOR PROGRAMMING1 DATA AUDIT1 DATA CACHE1 DATA COMPRESSION1 DATA DICTIONARY1 DATA TYPES1 DATABASE1 DATABASE ADMINISTRATION40 DATABASE CONNECTIONS1 DATABASE CORRUPTION2 DATABASE FILES2 DATABASE INTEGRITY1 DATABASE MAIL1 DATABASE MAINTENANCE14 DATABASE MANAGEMENT2 DATABASE MEMORY1 DATABASE MONITORING2 DATABASE OBJECTS1 DATABASE RECOVERY1 DATABASE ROLES1 DATABASE SCHEMA1 DATABASE SCRIPTS1 DATABASE SECURITY1 DATABASE STRUCTURE9 DBA SCRIPTS10 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 DMV4 DOCUMENTATION1 DUPLICATE INDEXES1 DYNAMIC SQL4 ERROR LOG1 EXECUTION PLAN1 FAILOVER READINESS1 FILEPROPERTY1 FOR SYSTEM_TIME1 FOREIGN KEYS2 FRAGMENTATION2 FULL BACKUP2 GRANT STATEMENTS1 HEAD BLOCKER1 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 LONG RUNNING TRANSACTIONS1 LOW MEMORY1 MAINTENANCE2 MAINTENANCE SCRIPTS20 MAX SERVER MEMORY1 MAXDOP1 MEMORY1 MEMORY CLERKS1 MEMORY CONFIGURATION1 MEMORY PRESSURE2 METADATA7 MISSING INDEXES1 MONITORING18 MOVE OPTION1 MSDB10 MSDB.DBO.BACKUPMEDIAFAMILY3 MSDB.DBO.BACKUPSET3 NONCLUSTERED INDEXES1 NORECOVERY1 NUMA2 OBJECT DEPENDENCIES1 OBJECT SEARCH1 OPEN TRANSACTIONS1 OPTIMIZATION2 OPTIMIZE FOR AD HOC WORKLOADS1 ORPHAN USERS1 PAGE COMPRESSION1 PAGE CORRUPTION1 PAGE LIFE EXPECTANCY1 PARAMETER SNIFFING1 PERFORMANCE21 PERFORMANCE MONITORING1 PERFORMANCE TUNING8 PERMISSIONS2 PLAN CACHE4 POINT IN TIME QUERY1 POINT IN TIME RESTORE1 PRIMARY KEYS3 PROCEDURE CACHE1 QUERY OPTIMIZATION2 QUERY OPTIMIZER1 QUERY PERFORMANCE1 QUERY STORE2 QUERY TUNING3 REBUILD REORGANIZE1 RECONFIGURE1 RECOVERY1 REFACTORING1 REFERENTIAL INTEGRITY1 REPORTING3 RESTORE2 RESTORE DATABASE1 RESTORE FILELISTONLY1 RESTORE VERIFYONLY1 RING BUFFER1 ROLE MEMBERSHIPS1 ROW COMPRESSION1 SCHEMA ANALYSIS2 SCHEMA AUDIT1 SCHEMA DOCUMENTATION1 SCHEMA MANAGEMENT1 SCRIPTS25 SECURITY4 SECURITY AUDIT2 SERVER MONITORING1 SESSION MANAGEMENT1 SIZE_IN_BYTES1 SP CONFIGURE1 SP_CHANGE_USERS_LOGIN1 SP_CONFIGURE3 SP_EXECUTESQL1 SP_PKEYS2 SP_READERRORLOG1 SP_SEND_DBMAIL1 SP_SPACEUSED1 SP_UPDATESTATS1 SPACE MANAGEMENT1 SPACE USAGE1 SQL1 SQL SCRIPTS40 SQL SERVER76 SQL SERVER AGENT2 SQL SERVER MONITORING1 SQLSERVER PROCESS UTILIZATION1 STATISTICS2 STORAGE2 STORAGE ERROR1 STORED PROCEDURES2 SUSPECT PAGES1 SYNCHRONIZATION HEALTH1 SYS.ALL_COLUMNS1 SYS.ALL_OBJECTS1 SYS.ALLOCATION_UNITS3 SYS.AVAILABILITY_GROUPS1 SYS.AVAILABILITY_REPLICAS1 SYS.COLUMNS9 SYS.COMPUTED_COLUMNS1 SYS.CONFIGURATIONS5 SYS.DATABASE_FILES3 SYS.DATABASE_PERMISSIONS2 SYS.DATABASE_PRINCIPALS3 SYS.DATABASE_ROLE_MEMBERS1 SYS.DATABASES15 SYS.DM_DB_FILE_SPACE_USAGE1 SYS.DM_DB_INDEX_PHYSICAL_STATS9 SYS.DM_DB_INDEX_USAGE_STATS4 SYS.DM_DB_LOG_SPACE_USAGE1 SYS.DM_DB_MISSING_INDEX_DETAILS1 SYS.DM_DB_MISSING_INDEX_GROUP_STATS1 SYS.DM_DB_MISSING_INDEX_GROUPS1 SYS.DM_DB_PARTITION_STATS3 SYS.DM_DB_STATS_PROPERTIES1 SYS.DM_DB_XTP_TABLE_MEMORY_STATS1 SYS.DM_EXEC_CACHED_PLANS3 SYS.DM_EXEC_CONNECTIONS2 SYS.DM_EXEC_INPUT_BUFFER1 SYS.DM_EXEC_PLAN_ATTRIBUTES1 SYS.DM_EXEC_PROCEDURE_STATS1 SYS.DM_EXEC_QUERY_PLAN1 SYS.DM_EXEC_QUERY_STATS3 SYS.DM_EXEC_REQUESTS4 SYS.DM_EXEC_SESSIONS4 SYS.DM_EXEC_SQL_TEXT7 SYS.DM_EXEC_TEXT_QUERY_PLAN1 SYS.DM_HADR_AVAILABILITY_GROUP_STATES1 SYS.DM_HADR_AVAILABILITY_REPLICA_STATES1 SYS.DM_HADR_DATABASE_REPLICA_CLUSTER_STATES1 SYS.DM_HADR_DATABASE_REPLICA_STATES1 SYS.DM_IO_VIRTUAL_FILE_STATS1 SYS.DM_OS_BUFFER_DESCRIPTORS1 SYS.DM_OS_MEMORY_CLERKS2 SYS.DM_OS_PERFORMANCE_COUNTERS2 SYS.DM_OS_PROCESS_MEMORY1 SYS.DM_OS_RING_BUFFERS1 SYS.DM_OS_SCHEDULERS1 SYS.DM_OS_SYS_INFO6 SYS.DM_OS_SYS_MEMORY1 SYS.DM_OS_VOLUME_STATS1 SYS.DM_OS_WAIT_STATS1 SYS.DM_OS_WAITING_TASKS1 SYS.DM_PDW_NODES_EXEC_PROCEDURE_STATS1 SYS.DM_RESOURCE_GOVERNOR_RESOURCE_POOLS1 SYS.DM_SERVER_SERVICES1 SYS.DM_SQL_REFERENCED_ENTITIES1 SYS.DM_SQL_REFERENCING_ENTITIES1 SYS.DM_TRAN_ACTIVE_TRANSACTIONS2 SYS.DM_TRAN_LOCKS1 SYS.DM_TRAN_SESSION_TRANSACTIONS1 SYS.FOREIGN_KEY_COLUMNS2 SYS.FOREIGN_KEYS3 SYS.IDENTITY_COLUMNS2 SYS.INDEX_COLUMNS7 SYS.INDEXES12 SYS.KEY_CONSTRAINTS3 SYS.LOGIN_TOKEN1 SYS.MASTER_FILES4 SYS.OBJECTS19 SYS.PARTITIONS9 SYS.PROCEDURES1 SYS.QUERY_STORE_PLAN1 SYS.QUERY_STORE_QUERY1 SYS.QUERY_STORE_QUERY_TEXT1 SYS.QUERY_STORE_RUNTIME_STATS1 SYS.QUERY_STORE_RUNTIME_STATS_INTERVAL1 SYS.SCHEMAS9 SYS.SERVER_PRINCIPALS3 SYS.SP_ENUMERRORLOGS1 SYS.SQL_EXPRESSION_DEPENDENCIES1 SYS.SQL_MODULES2 SYS.STATS1 SYS.TABLES17 SYS.TYPES2 SYS.VIEWS1 SYSCOLUMNS1 SYSDATABASES1 SYSINDEXES3 SYSJOBHISTORY1 SYSJOBS1 SYSMAIL_ADD_ACCOUNT_SP1 SYSMAIL_ALLITEMS1 SYSMAIL_EVENT_LOG1 SYSOBJECTS10 SYSTEM IDLE PROCESS1 SYSTEM TABLES4 SYSTEM VERSIONING1 T-SQL2 TABLE ANALYSIS1 TABLE INVENTORY1 TABLE MAINTENANCE1 TABLE SIZE1 TABLE STATISTICS1 TEMPDB1 TEMPORAL TABLES1 TRANSACTION LOG4 TRANSACTION LOG BACKUP1 UPDATE STATISTICS2 USECOUNTS1 VIEWS1 VIRTUAL LOG FILES1 WAIT STATISTICS1 WAIT TYPES3 XP_CMDSHELL1 XP_READERRORLOG1 XTP1
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