Page Comparison

--Query To Create Extended Events Session
CREATE EVENT SESSION [KADA] ON SERVER ADD EVENT sqlserver.sp_statement_completed (
	ACTION(package0.collect_system_time, package0.event_sequence, sqlos.task_time, sqlserver.client_app_name, sqlserver.client_hostname, sqlserver.database_id, sqlserver.database_name, sqlserver.nt_username, sqlserver.query_hash, sqlserver.server_instance_name, sqlserver.server_principal_name, sqlserver.server_principal_sid, sqlserver.session_id, sqlserver.session_nt_username, sqlserver.transaction_id, sqlserver.username) WHERE (
		(
			[statement] LIKE '%CREATE %'
			OR [statement] LIKE '%DROP %'
			OR [statement] LIKE '%MERGE %'
			OR [statement] LIKE '%FROM %'
			)
		AND [sqlserver].[server_principal_name] <> N'USERS_TO_EXCLUDE'
		AND [sqlserver].[is_system] = (0)
		AND NOT [statement] LIKE 'Insert into % Values %'
		AND [sqlserver].[Query_hash] <> (0)
		)
	), ADD EVENT sqlserver.sql_statement_completed (
	SET collect_statement = (1) ACTION(package0.collect_system_time, package0.event_sequence, sqlos.task_time, sqlserver.client_app_name, sqlserver.client_hostname, sqlserver.database_id, sqlserver.database_name, sqlserver.nt_username, sqlserver.query_hash, sqlserver.server_instance_name, sqlserver.server_principal_name, sqlserver.session_id, sqlserver.session_nt_username, sqlserver.transaction_id, sqlserver.username) WHERE (
		(
			[statement] LIKE '%CREATE %'
			OR [statement] LIKE '%DROP %'
			OR [statement] LIKE '%MERGE %'
			OR [statement] LIKE '%FROM %'
			)
		AND [sqlserver].[server_principal_name] <> N'N'USERS_TO_EXCLUDE'
		AND [sqlserver].[is_system] = (0)
		AND NOT [statement] LIKE 'Insert into % Values %'
		AND [sqlserver].[Query_hash] <> (0)
		)
	) ADD TARGET package0.event_file (SET filename = N'G:\extended events\Extendedevents.xel', max_file_size = (20), max_rollover_files = (100))
	WITH (MAX_MEMORY = 4096 KB, EVENT_RETENTION_MODE = ALLOW_MULTIPLE_EVENT_LOSS, MAX_DISPATCH_LATENCY = 30 SECONDS, MAX_EVENT_SIZE = 0 KB, MEMORY_PARTITION_MODE = NONE, TRACK_CAUSALITY = ON, STARTUP_STATE = ON)
GO


-- Check if the session is dropping events and see other data about the session
-- https://sqlperformance.com/2019/10/extended-events/understanding-event-loss-with-extended-events
SELECT
   s.name, 
   s.total_regular_buffers,
   s.regular_buffer_size,
   s.total_large_buffers,
   s.large_buffer_size,
   s.dropped_event_count,
   s.dropped_buffer_count,
   s.largest_event_dropped_size
FROM sys.dm_xe_sessions AS s;


-- Also check log growth rate. Apply filters to remove noise.
-- some filters:
-- [sqlserver].[server_principal_name] = N'name of principal'
-- [sqlserver].[is_system] = (0)
-- [sqlserver].[client_app_name] = N'name of app'