The AskTOM Archive - selected presentations from Tom Kyte from Oracle Corporation 2010-2015.

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Why Engineered Systems
Oracle Database 12c
Cary Millsap and Thomas Kyte
http://www.enkitec.com/
http://asktom.oracle.com/

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In a Warehouse environment, how
many DBAs can tell you how many
GB/sec they can transfer from disk to
server?
In an OLTP environment, what
would happen if log writes on a
busy system went from an
average of
3–5ms to 7–10ms (or longer)?
In a Warehouse environment, how
do you “size” your storage? By
gigabytes or gigabytes/second?
In an OLTP
environment, what do
you probably wait on
more than anything?

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Getting cross domain expertise to work together…

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Exadata is Smart Storage
 Database Servers
– Perform complex database processing such as
joins, aggregation, etc.
 Exadata Storage Servers
– Storage Server is smart storage, not a DB node
– Search tables and indexes filtering out data that is
not relevant to a query
– Cells serve data to multiple databases enabling
OLTP and consolidation
– Simplicity, and robustness of storage appliance
Compute and Memory
Intensive Processing
Data Intensive
Processing

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Filter Early, Filter Fast
Zone Maps
Attribute Clustering
Partitioning
Bloom Filtering
Flash Cache
HCC
Storage Indexes

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Until Now Must Choose One Format and Suffer Tradeoffs
Row Format Databases vs. Column Format
Databases
Row
 Transactions run faster on row format
– Example: Insert or query a sales order
– Fast processing few rows, many columns
Column
 Analytics run faster on column format
– Example : Report on sales totals by region
– Fast accessing few columns, many rows
SALES
SALES

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Oracle Multitenant
New architecture for consolidating databases and simplifying operations
8
db1 db2
db3 Self-contained PDB for each application
• Applications run unchanged
• Rapid provisioning (via clones)
• Portability (via plugability)
Shared memory and background
processes
• More applications per server
Common operations performed at CDB
level
• Manage many as one (upgrade, HA, backup)
• Granular control when appropriate

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