Download Javier Villegas – DBA | MCP | MCTS

SQL Advanced Monitoring
Using DMV, Extended Events and Service Broker
• Javier Villegas – DBA | MCP | MCTS
Speaker Bio
Picture Here
Javier Villegas
Buenos Aires, Argentina.
Database Administrator
Since 1997 – SQL 6.0 -> SQL 2016
MCP - MCTS
DBA at Mediterranean Shipping Company
@javier_vill
Since 2006
https://ar.linkedin.com/in/javiervillegas
PASS Member
Since 2008
http://sql-javier-villegas.blogspot.com.ar/
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Agenda
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Analyzing SQL activity
Continuous monitoring with Extended Events (XEvents)
Proactive monitoring(DMV / Powershell)
Auditing using Service Broker
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Analyzing SQL Server Activity
dbo.SP_DBA_CurrentlyExec
http://1drv.ms/1j9es6f
• Allow us to quickly see all the SQL Activity
• Each row represents an active sessions
• We can see below:
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SPID, CPU usage, Status, Start Time, Elapsed time, Read/Write times, SQL Statement, Database name and it’s
transaction log usage, Object Name, Wait Stat, Login, Host and Application name
• If detects a blocking situation it will show a second result set with all the sessions involved
• Useful to quickly detect performance problems
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dbo.SP_DBA_CurrentlyExec
Example
Blocks
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dbo.SP_DBA_CurrentlyExec
dbo.SP_DBA_CurrentlyExec @info=1
dbo.SP_DBA_CurrentlyExec @Filter_Name=‘App_Name’, @Filter_Value=‘SSIS’
dbo.SP_DBA_CurrentlyExec @Filter_Name=‘Host_Name’, @Filter_Value=‘WORKSTS01’
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dbo.SP_WhoIsActive
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sp_server_diagnostics
• Captures diagnostic information and health data from SQL to detect
possible system failures.
• This process is running in background constantly and periodically
updates the results for the output
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sp_server_diagnostics
• Create_Time
Timestamp
• Component_Type
Indicates whether the row contains information for the SQL Server instance level component or for an
AlwaysOn availability group
• Component_Name
system , resource , query_processing , io_subsystem , events , <name of the availability group>
• State
0, 1, 2 or 3
• State_Desc
“Unknown”, “Clean”, “Warning”, “Error”
• Data
XML
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sp_server_diagnostics
• System
CPU, Dumps, Pages, etc.
• Resource
Memory
• Query_processing
Tasks, Wait Stats, bloques, etc.
• IO_subsystem
I/O info
• Events
Server events
• Availability Group
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sp_server_diagnostics
Examples
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Analyzing SQL Server Activity
Other Tools
• Performance Monitor
• Activity Monitor
• SQL Server Performance Dashboard
https://www.microsoft.com/en-us/download/details.aspx?id=29063
• SQL Profiler *
• Extended Events
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Continuous monitoring with Extended Events
• Extended Events
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General events control system
Correlates database and operating system events
Follow-up tool(Performance Monitor / SQL Trace)
Configurable with T-SQL
Useful to troubleshoot without performance impact (minimal extra load)
Collects data from:
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I/O
Waits
Query Parameters
Execution Plans
Lock
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Continuous monitoring with Extended Events
• Extended Events - Components
• Session
• Definition of what is going to collected as well as when to start and where to store the
collected data
• Target
• Memory (Ring Buffer)
• File
• Package
• Logical containers
• SQLOS, SQLSERVER, SecAudit, SQLCLR, etc.
• Events
• Data collection
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Continuous monitoring with Extended Events
• Extended Events
• We can collect same events as with SQL Profiler (Even more since MS keep
updating them)
• Lighter than SQL Profiler.
• Easy to work with (T-SQL , XML)
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DEMO
• Analyzing SQL Server Activity
• SP_DBA_CurrentlyExec
• SP_Server_Diagnostics
• Extended Events
• SQL Errors
• Deadlocks
• Long running SQL Statements
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Proactive monitoring(DMV / Powershell)
• Continuously collecting key data and vital signs from the SQL Instance
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SQL Server and Windows Version and Edition
MAXDOP
Cluster
Database Mirroring/AlwaysOn
Network
Active Transactions
Transactions per second
Active connections
Performance Monitor counters related to I/O using PowerShell
I/O Latency
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Proactive monitoring(DMV / Powershell)
• Also…
• SQL Job running every minute that perform below tasks
• Runs “currently executing”. Storing the results just if detects blocks or if there is an statement
running for over X minutes
• Sends email with the blocking reports
• The table used to keep data from “Currently Executing” is very useful when we have to investigate
performance issues from the past
• Check transaction log usage for all the databases (Sends emails with reports)
• Disks Usage Used vs Free Space (Sends email when there is less than 1 GB or 7% from total –
This can be configurable)
• Detects open transactions for more than X minutes
• Detects SQL Dumps
• Detects critical errors from SQL Error Log
• Disks Usage and performance info using PerfMon
• Disks latencies reports
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Auditing
• We can create a system using Service Broker to help us to audit objects
manipulation within an user database
• Table with rows identifying every CREATE , DROP or ALTER
• Each row contains below:
• Event Timestamp
• Event type
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CREATE_PROCEDURE, DROP_TABLE, etc.
Login used for the event
Schema and object name
Object type
Session ID for the event
HostName (*)
XML with the details
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Proactive monitoring(DMV / Powershell)
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Proactive monitoring(DMV / Powershell)
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Proactive monitoring(DMV / Powershell)
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Proactive monitoring(DMV / Powershell)
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Proactive monitoring(DMV / Powershell)
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DEMO
• Proactive monitoring
• Audit
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Questions?
@javier_vill
https://ar.linkedin.com/in/javiervillegas
http://sql-javier-villegas.blogspot.com.ar/