Jared Still

"Oracle experience: started with Oracle 7.0.13 Programming Experience: Perl, PL/SQL, Shell, SQL Also some other odds and ends that are no longer useful Systems: Networking, Storage, OS to varying degrees. Have fond memories of DG/UX"

Oracle

Controlling Oracle Fetch Sizes with Oraaccess.xml

Most Oracle DBAs are probably familiar with the concept of fetch size. The fetch size is the number of rows that are ...

Oracle

Expand your Oracle Tuning Tools with dbms_utility.expand_sql_text

Background When working on a view composed of SELECT statements on other views, it can be difficult to know what the ...

Oracle

Mitigating Long Distance Network Latencies with Oracle Client Result Cache

Recently, Pythian was engaged to investigate the performance of an application that was reported as performing poorly ...

Oracle

Oracle SQL Trace: Is it Safe for Production Use?

Perhaps you have been approached by a client or manager and tasked with troubleshooting one or more slow-running SQL ...

Oracle

Backup Oracle to Amazon AWS S3 - Part 1

Backup Oracle to S3 - Part 1 Oracle has the ability to backup directly to Amazon S3 buckets.

Oracle

Sending email from Oracle with utl_smtp via Amazon Simple Email Service (SES)

Note: This article was updated following Symantec Trust issues earlier in 2018.

Oracle

Oracle 12.2 ASM filter driver installation

Recently I needed to install Oracle 12.2 with the ASM Filter Driver for some research on an upcoming presentation. With ...

Oracle

Oracle RAC: Network Performance with Jumbo Frames

Introduction When working with Oracle RAC, it's strongly advised to use Jumbo Frames for the network that provides the ...

Oracle

World Backup Day - Protect Your Oracle Databases

In recognition of World Backup Day, I will discuss backups as they pertain to Oracle databases. There are a number of ...

Oracle

More fun with oracle timestamp math

Timestamp Math Several years ago I wrote an article on Oracle date math. Amazingly, that article was still available ...

Oracle

Using FreeRadius to Authorize Oracle Connections

Introduction This article will show how to configure the FreeRadius RADIUS server for use in authorizing Oracle ...

Oracle

How to decipher oracle Internal datatype storage

What started out as an investigation into how the optimizer deals with predicates that are outside the known range of ...

Oracle

What's eating my database? Where to focus performance efforts using Oracle AWR

Defining the Gold Standard: Average Active Sessions (AAS) Traditional methods would include looking at CPU, load and ...

Oracle

Analyze index validate structure - the dark side

Recently, a co-worker encountered a significant performance hurdle after a database upgrade. The plan included ...

Oracle

Improve parsing and query performance - fix Oracle's fixed object statistics

What do I mean by 'fix' the the fixed object statistics? Simply gather statistics to help the optimizer. What are ...

Oracle

Installing OCI Command Line Utilities in Linux and Windows

As part of a recent project, I installed the Oracle Cloud command line utilities (oci) on the following Linux systems:

Oracle

Improve Oracle performance with ASM filter driver

Context Sometimes the results found in performance testing can be a bit of a surprise. I have recently been preparing ...

Oracle

How to create an Oracle 18c client image in Docker

In a previous blog How to use Oracle instant client docker images, I described how to obtain and customize an Oracle ...

Oracle

How to use Oracle Instant Client Docker images

There are two available, both Version 12.2. One is found on Docker Hub and the other on the Oracle Container Registry. ...

Oracle

Cleaning up PID files when Oracle GRID/RAC upgrades and patches fail

Introduction: Unfortunately is it not all that unusual for a patch or upgrade to Oracle Grid or RAC to fail, requiring ...

Cloud

CPU utilization is not a useful metric

Once upon a time CPU utilization was quite a useful metric. Following are the output of several tools that provide CPU ...

Microsoft SQL Server

How to display database statistics for all objects used in a SQL statement

When my current task is to optimize a particular SQL statement, I find it quite useful if I can determine if the ...

Oracle

How Linux Hugepages work to improve Oracle performance

This post is not intended to be an in-depth discussion of how Linux Hugepages work, but rather just a cursory ...

MySQL

How to immediately kill ALL processes for a Unix user

Context On occasion I have found it necessary to immediately kill all processes for a particular user on a Linux or ...

Oracle

Select vs Assign – How To Assign PL/SQL Variables

Select vs Assign It isn’t unusual to see PL/SQL that contains select columns into variables from some_table This is ...

Oracle

How to Make Oracle Use the Correct Index

Introduction When the “wrong” index is used for a SQL query, it’s sometimes a struggle to coerce Oracle to use the ...

Oracle

Round Trip Network Latency Tests for your Remote Database Service

If you are using a remote Oracle database service, such as Oracle’s Autonomous Transaction Processing database, or an ...

Oracle

Big Savings on Oracle REDO Via Temp UNDO

Background When Oracle introduced version 12.1 of the RDBMS, an interesting new parameter was included: ...

Oracle

Automating Scripts Via SSH

Have you ever logged on to a Linux machine, only to be greeted by a prompt requesting you make some choice? It’s ...

Oracle

SYSQL: SysAdmin Query Language

What is SYSQL? Recently Tanel Poder and I were discussing the use of Linux command pipelines for data analysis, and ...

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Jared Still

Posts by Jared Still

Controlling Oracle Fetch Sizes with Oraaccess.xml

Expand your Oracle Tuning Tools with dbms_utility.expand_sql_text

Mitigating Long Distance Network Latencies with Oracle Client Result Cache

Oracle SQL Trace: Is it Safe for Production Use?

Backup Oracle to Amazon AWS S3 - Part 1

Sending email from Oracle with utl_smtp via Amazon Simple Email Service (SES)

Oracle 12.2 ASM filter driver installation

Oracle RAC: Network Performance with Jumbo Frames

World Backup Day - Protect Your Oracle Databases

More fun with oracle timestamp math

Using FreeRadius to Authorize Oracle Connections

How to decipher oracle Internal datatype storage

What's eating my database? Where to focus performance efforts using Oracle AWR

Analyze index validate structure - the dark side

Improve parsing and query performance - fix Oracle's fixed object statistics

Installing OCI Command Line Utilities in Linux and Windows

Improve Oracle performance with ASM filter driver

How to create an Oracle 18c client image in Docker

How to use Oracle Instant Client Docker images

Cleaning up PID files when Oracle GRID/RAC upgrades and patches fail

CPU utilization is not a useful metric

How to display database statistics for all objects used in a SQL statement

How Linux Hugepages work to improve Oracle performance

How to immediately kill ALL processes for a Unix user

Select vs Assign – How To Assign PL/SQL Variables

How to Make Oracle Use the Correct Index

Round Trip Network Latency Tests for your Remote Database Service

Big Savings on Oracle REDO Via Temp UNDO

Automating Scripts Via SSH

SYSQL: SysAdmin Query Language

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