1. Curacao SQL Saturday June 11, 2016
SQL Server OLTP - Monitoring and Troubleshooting

2. Introduction What is OLTP ? Why monitor?
SQL Server built-in monitoring tools
What to monitor?
Before and after monitoring?
Troubleshooting deadlocks and high CPU
Advance troubleshooting tools
Questions

3. What is OLTP ?
OLTP (On-line Transaction Processing) is characterized by a large number of short on-line transactions (INSERT, UPDATE, DELETE). The main emphasis for OLTP systems is put on very fast query processing, maintaining  data integrity in multi-access environments and an effectiveness measured by number of transactions per second.
-Very high transactions per second -Large number of batch requests per second
-Small problem can cause a big damage –
Scary !!!!

4. Yes Scary !!!!!

5. Why monitor? Optimize the Business Application of SQL Server
Minimize the User or Query Response Time
Maximize the Throughput
Reduce unwanted horror !!!

6. Before and after monitoring?
Strategies for Performance Tuning
Selecting an Approach to Performance Tuning
Developing a Performance Tuning Methodology
Establishing a Performance Baseline
Detecting Performance Bottlenecks
Common Monitoring Tasks

7. SQL Server built-in monitoring tools
Activity Monitor
Reports
DMV’s
Sp_who2
SQL Server Profiler
SQL Server Agent and Server logs

8. What to monitor? Decide What to Examine
Memory, CPU use, disk I/O, user connection, and locks
Know the Acceptable Range
Extremes above or below the baseline may indicate bottlenecks
System-Level Monitoring
Hardware
Operating system
Application
SQL Server-Specific Monitoring
SQL Server activity
Data consistency
Specific Query Performance

9. Troubleshooting deadlocks and high CPU ?
SQL Server log Traceflag 1222 -must be set globally
Deadlock graph (Demo)
Msg 1205, Level 13, State 51, Line 3 Transaction (Process ID xx) was deadlocked on {xxx} resources with another process and has
been chosen as the deadlock victim. Rerun the transaction.
Finding the high CPU taker using a monitoring tool (activity monitor, SQL Sentry etc..)
Try to fix it (recompile, update stats, query hints)

10. Advance troubleshooting tools ?
SQL Sentry
Red gate SQL monitor
Veeam explorer
Windows perfmon Counters –Demo
Windows logs

11. Questions
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