enterprise db

The Great Debate:

PostgreSQL versus MySQL

Jim Mlodgenski

VP, Technical Services

EnterpriseDB

Agenda

Open Source Database Trends

PostgreSQL Strengths

PostgreSQL Weaknesses

MySQL Strengths

MySQL Weaknesses

Application Types

About EnterpriseDB

Open Source Database Trends (cont.)


Battle for Open Source Database Dominance


Battle for Database Dominance

Agenda




MySQL Strengths

MySQL Weaknesses

Application Types

About EnterpriseDB


Strong Advanced Feature Support

Triggers, Stored Procedures, Rules

Server side languages

SQL, Java, Ruby, Perl, Python, TCL, etc

Point in Time Recovery

Table partitioning

Transactional DDL

Table Inheritance

PostgreSQL Strengths (cont.)

Strong Security Object Level Privileges assigned to Roles & User.

Kerberos + SSL communication.

Data Level Encryption (AES, 3DES, etc)

Ability to utilise 3rd party Key Stores in a full PKI

infrastructure

Foundation for full compliance with some of the strictest of

security standards (PCI Data Security Standard).

By default PostgreSQL is probably the most security-aware database

available

David Litchfield - The Database Hackers Handbook


Data Integrity

Multi Version Concurrency Control

Write Ahead Logging

Online Backup

Foreign Keys

Constraints


Flexible BSD license

Corporate IT developers can modify open source

code under the BSD license without having to

contribute back enhancements

Independent Software Vendors are free to

redistribute without the fear of being infected by an

open source license


Strong Open Source Community Independent & Thriving Development Community

10 committers and ~200 reviewers

1,500 contributors and 10,000+ members

2,000,000+ downloads

20 years of enterprise-class development

Agenda




MySQL Strengths

MySQL Weaknesses

Application Types

About EnterpriseDB


Lack of an integrated replication solution

External solutions are required

There is no agreed solution in the

PostgreSQL community for the

majority of replication

requirements

The current external solutions

have a high learning curve

PostgreSQL Weaknesses (cont.)

No upgrade facility for major releases

The data must be either exported or replicated to the

new version

At least twice of the storage is needed during the upgrade process

On large datasets, an upgrade is a very time consuming process


Performance issues

Indexes can not be

used to directly return

the results of a query

Query execution plans

are not cached

Some update and delete operations leave expired

data in the data files causing more IO

Bulk loading operations may become CPU bound


Lack of experienced production talent

Many of the experienced

PostgreSQL administrators do not

have experience in large

corporate environments


Sparse Independent Software Vendor support

There are few management and monitoring tools

capable of using PostgreSQL

When tools are available, many times it is through a

generic ODBC or JDBC data source

PostreSQL is Rarely the primarily database for an

application, including open source applications

Agenda




MySQL Strengths

MySQL Weaknesses

Application Types

About EnterpriseDB

MySQL Strengths

Integrated Replication

Master-Slave Replication

Scale-Out Implementations

Offload Reporting

Geographic Data Distribution

MySQL Cluster

Horizontal Scalability

MySQL Strengths (cont.)

Performance

Low overhead MyISAM storage engine for read

mostly applications

Memory storage engine for frequently accessed

tables

Query Cache for frequently used statements


Multiple Storage Engines

Native Storage Engines

MyISAM

Merge

Memory

Federated

Partner Developed Storage Engines

InnoDB

solidDB

Infobright


Strong Corporate Backing

Corporate Platinum Partners


Popularity

Independent Software Vendor Support

Availability of experienced resources

Easily accessible information from various sources

such as whitepapers, blogs, and books

Agenda




MySQL Strengths

MySQL Weaknesses

Application Types

About EnterpriseDB

MySQL Weaknesses

Metadata uses MyISAM

Transactions involving the system

catalog are not ACID compliant

A server crash can corrupt the

system catalog

MySQL Weaknesses (cont.)

Immature security model

No pluggable authentication

module preventing centrally

managed accounts

No support for roles resulting in

difficulty in maintaining privileges

for many users


Immature server side programming model

Stored procedures are not cacheable

All tables used in the procedure or trigger are

pre-locked

All cursors are materialized

Only supports SQL


Scalability Problems

Difficulty with increases

in concurrency

Difficulty with an increase

in the number of cores in

the server


Closed Open Source Community

The community is not contributing to the MySQL

server code base

It is currently very hard to contribute code and ideas

There are not many MySQL developers that are also

using MySQL

Developers outside of MySQL do not have commit

rights

There are no new 'innovative' features in 5.1 from

real life applications

Agenda




MySQL Strengths

MySQL Weaknesses

Application Types

About EnterpriseDB

Application Types

MySQL

Web 1.0 Type Applications

The MyISAM storage engine is ideal for online catalog

functionality

Dynamic data is centered around an individual user such

as user profiles and shopping carts

Application Types

MySQL

Reporting and Data Warehousing

The pluggable storage engine facility

allows for enhanced business

intelligence functionality

Infobright

The MyISAM storage engine has very

low overhead for read intensive

applications

Application Types

MySQL

Commercial and Open Source Applications

MySQL is the primary database for many of the popular

open source projects

Many commercial applications include MySQL in the

demonstration versions

Application Types (cont.)

PostgreSQL

Web 2.0 Type Applications

The use of a distributed memory cache offloads many of

the queries from the database resulting in a heavy

transactional load

The dynamic data such

as forum posts and wikis

are commonly being

viewed by users while

updates are occurring


PostgreSQL

Operational Data Stores

The data is constantly changing

while reports executing

Leverages the Multi Version

Concurrency Control feature

Multiple users running reports

simultaneously requiring a scalable

database


PostgreSQL

New Application Development

The numerous procedural languages allows developers

to leverage existing knowledge

Transactional DDL is

almost a requirement in a

Ruby environment

Debugging server side

code speeds the

development process

Agenda




MySQL Strengths

MySQL Weaknesses

Application Types

About EnterpriseDB

EnterpriseDB Company Facts

Award-winning enterprise open source database company

Worlds largest concentration of PostgreSQL expertise including several core team members

Founded in March 2004

Headquartered in Edison, NJ and offices in 6 countries.

Over 250 customers including: Sony, FTD, TDAmeritrade, British Telecom

65 partners including: Red Hat, Sun, IBM, Cognos, Compiere

Best Database Award

2005, 2006 & 2007

Top 100 Technology

Companies

2006 Ones to Watch

Postgres Plus

Postgres Plus Advanced

Server offers additional

features including Oracle

compatibility

Postgres Plus is fully open

source and contains the

PostgreSQL project along

with additional components

Sample Customer Case Studies

Oracle-based Custom Applications

Sony replaced Oracle for on-line games, user forums, back-office

Oracle-based ISV

Tomax, retail industry ISV, replaced Oracle as default database

MySQL upgrade for Custom Applications

Vonage scaled applications from MySQL to EnterpriseDB

SQL Server upgrade by 3rd party ISV

Replaced SQL Server as embedded mammography database

Oracle-based Business Intelligence

Running Oracle Reports on EnterpriseDB; saved 80%
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Contact Information

Jim Mlodgenski

VP, Technical Services, EnterpriseDB

[email protected]

Thank you.

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