sql server knowledge-session (sql server vs oracle, and performance)

SQL ServerRijswijk, june 2016

01-05-20232

Agenda

Who am I SQL Server vs Oracle Backups Monitoring Performance Support Future Questions?

SQL Server

01-05-20233

Who am I

Pierre van der Ven

Working since 1998 in ITStarted as programmer, switched to DBAAssigned with several big customersLast years mainly focus on SQL Server

I am a nerd

SQL Server

01-05-20234

Oracle vs SQL Server

Language

SQL T-SQL (Transact SQL) PL/SQL

SQL Server

01-05-20235

Oracle vs SQL Server

Naming the ‘objects’

SQL Server

Database Instance / DatabaseSchema Database and database owner (DBO)Tablespace FilegroupUser UserRole Group/RoleTable TableTemporary tables Temporary tablesCluster N/AColumn-level check constraint Column-level check constraintColumn default Column defaultUnique key Unique key or identity property for a

columnPrimary key Primary key

Oracle SQL Server

01-05-20236

Oracle vs SQL Server

Naming the ‘objects’

SQL Server

Foreign key Foreign keyIndexes Indexes

PL/SQL Procedure Transact-SQL (T-SQL) stored procedure

PL/SQL Function T-SQL stored procedurePackages N/AAFTER triggers TriggersBEFORE triggers Complex rulesTriggers for each row N/ASynonyms N/AIdentity Identity property for a columnSnapshot (table-based) Snapshot (database-based)View View

Oracle SQL Server

01-05-20237

Oracle vs SQL Server

Naming the ‘objects’ (DBA)

SQL Server

TEMP-tablespace tempdbUndo-tablespace tempdb

RAC Always On

Flashback Snapshots ...

Oracle SQL Server

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In Oracle, not in SQL Server

Packages Triggers for each row Synonyms Snapshots Flashback

SQL Server

01-05-20239

In SQL Server, noy in Oracle

Pluggable databases (since 12c in Oracle) Auto-increment values (since 12c in Oracle)

SQL Server

01-05-202310

Transaction Control

SQL Server

SQL ServerCommits on default after every command. It is complex to change this behavior.

OracleCommits when you commit. More control.

01-05-202311

Transactionlog

SQL Server

OracleArchivelog / noarchivelogOracle is using redo-logs. When a redo-log is full, it makes a copy to a archivelog and rotates to the next member of the redo-log.

SQL ServerFull Recovery / simple modeSQL Server writes transaction-data to the transactionlog. In full recovery it maintains this data until a backup has been made. In simple mode it maintains the transaction-log data during the transaction.

01-05-202312

Transactionlog

SQL Server

Oracle

01-05-202313

Transactionlog

SQL Server

SQL Server

01-05-202314

Backups

SQL Server

Oraclermantool from supplier

SQL ServerVia SSMS (SQL Server Management Studio)tool from supplier (ie NetBackup SQL client)

01-05-202315

Monitoring

Oracle: Oracle Enterprise Manager (OEM) / Grid Control

SQL Server: - Alerts- System Centre Operations Manager (SCOM)

In OEM you can modify settings of the database, in SCOM that is not possible. SCOM is only for monitoring. If you want to change settings, use SSMS.

SQL Server

01-05-202316

What is hammering my instance

SQL Server

01-05-202317

What is hammering my instance

Always start with the activity monitor:

SQL Server

01-05-202318

What is hammering my instance

Check the task manager:

SQL Server

01-05-202319

What is hammering my instance

Ga na of er blocking locks zijn:

SQL Server

Z

01-05-202320

What is hammering my instance

Kijk of er blocking locks zijn:

SQL Server

Z

Search for queries with a lot of physical reads:

01-05-202321

What is hammering my instance

SQL Server

Perfmon

Microsoft’s definition:

‘A handy tool built into Windows®, an assist you in diagnosing the problem’

01-05-202322

What is hammering my instance

SQL Server

Perfmon

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What is hammering my instance

SQL Server

Perfmon

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What is hammering my instance

SQL Server

PerfmonFirst make a Data Collector Set, save it and change it afterwards to get the screen below:

01-05-202325

What is hammering my instance

SQL Server

Page Life Expectency (PLE)

PLE is the time in seconds how long the page stays in the bufferpool. This is related to the memory-pressure. If the page has been flushed from the bufferpool, it needs to be loaded from disk.

01-05-202326

What is hammering my instance

SQL Server

Page Life Expectency (PLE)

01-05-202327

What is hammering my instance

SQL Server

Page Life Expectency (PLE)

In the past: If below 300 seconds, add more memory

Nowadays:

01-05-202328

What is hammering my instance

SQL Server

SQL Server ProfilerYou only get this option if you install the add-ons for SSMS.

01-05-202329

What is hammering my instance

SQL Server

SQL Server Profiler

01-05-202330

What is hammering my instance

SQL Server

SQL Server Profiler

01-05-202331

What is hammering my instance

SQL Server

SQL Server Profiler

01-05-202332

What is hammering my instance

SQL Server

Indexes

• Missing indexes• Unused indexes• Fragmented indexes

01-05-202333

What is hammering my instance

SQL Server

Maintenance

Automatic (initial setup needed)• Reorganize indexes• Rebuild indexes• Refresh statistics• Cleanup logging

Manual• Create missing indexes• Drop unused indexes

Ola Hallengren

01-05-202334

Support

SQL Server

Bron: http://sqlserverupdates.com/

01-05-202335

Future

SQL Server

Questions?