Pythian Marketing

Microsoft SQL Server

SQL Server: More light shed on "non-yielding scheduler" and Indexes stats

SQL server folks may find the "non-yielding scheduler" warning familiar and it is usually (if not always) associated ...

Oracle

Secrets of Oracle's Automatic Degree of Parallelism

Background: Automatic degree of parallelism, or Auto DOP, is a new feature in 11gR2 that promises to help manage ...

Oracle

Quick Install Guide for Oracle 10g Release 2 on Mac OS X Leopard & Snow Leopard

I was very surprised that Oracle released Oracle Database for Mac OSX, especially, version 10g now that 11g has been ...

Microsoft SQL Server

SQL server:opening errorlog:Failed to retrieve data for this request

After an in place upgrade of SQL server 2005 to SQL server 2008 R2 , I tried to open SQL errorlog from Management> ...

Oracle

Oracle 11gR2 Grid Infrastructure -- Memory Footprint

Upgrading to 11g Release Grid Infrastructure? You probably want to read on...

MySQL

Why are your indexes larger than your actual data?

It’s a common but startling sight for any DBA: you look at your database statistics and realize your indexes are ...

MySQL

InnoDB error: Total number of locks exceeds the lock table size

Recently, one of our customers had a problem with one of their replication slaves where a sql statement gave an error ...

MySQL

Exporting the mysql.slow_log table into slow query log format

Using pt-query-digest is an excellent way to perform a SQL review. However, sometimes you don't have access to the ...

MySQL

How and why tmp_table_size and max_heap_table_size are bounded.

Overview In some cases, MySQL creates internal temporary tables while processing queries. On the base of the dimensions ...

Oracle

Exadata's Best Kept Secret: Storage Indexes

While features like Smart Scan often steal the spotlight in Exadata discussions, Storage Indexes are a silent ...

Oracle

Exadata TPC Benchmarks

Notice One of the questions in my webinar this week related to TPC benchmark results for Exadata. Kevin Closson blogged ...

Oracle

Cloning Oracle Home from RAC to Stand-Alone

This should have been the easiest task on my todo list: Install Oracle 10.2.0.3 EE standalone on a new Linux RHEL 5 ...

Oracle

How to Dynamically Call PL/SQL Procedure in Oracle

Dynamic procedure calls in Oracle PL/SQL Just got an interesting note on Twitter that you can’t call a stored procedure ...

Oracle

Running querys against multiple SQL Server AND Oracle instances

Background It is not unusual that a DBA needs to run the same query across multiple instances. The query can be ...

Oracle

Unofficial Oracle Database Appliance FAQ

Introduction I’ve started putting together some information about the Oracle Database Appliance in question-and-answer ...

MySQL

How I Find MySQL Fragmentation

Background Sarah Novotny recently posted InnoDB Tablespace Fragmentation – Find it and Fix it, so I thought I would ...

Microsoft SQL Server

SQL server: Create missing indexes with unmessing names

If you do any performance tuning, and everyone does, then you’ll come to a point where you want to know if your tables ...

Oracle

Patching an 11gR2 Grid Infrastructure Home

Introduction The process for applying a patch on top of the CRS, or now called, the Grid Infrastructure, has changed ...

MySQL

Rounding Errors in MYSQL with DECIMAL Type

It seems to be assumed that fixed-point values, DECIMAL and NUMERIC, in MySQL are not susceptible to rounding errors ...

MySQL

How To Access MySQL from Oracle With ODBC and SQL

The Oracle gateway for ODBC provides an almost seamless data integration between Oracle and other RDBMS. I won’t argue ...

Microsoft SQL Server

Check URL status from SQL server

One of our clients has a public web page and they needed to ensure that it is always up and accessible. Pythian already ...

MySQL

Change Views DEFINER Without ALTER VIEW: How to Fix Thousands of Views

Recently I faced an interesting challenge: modify over 26k views on a single mysqld instance. Altering the view one by ...

Oracle

Exadata smart scans and the flash cache

Context One of the key features of Exadata V2 is the flash cache. Although commonly thought of as an OLTP-specific ...

MySQL

Notes on Learning MySQL (as an Oracle DBA)

I spent some time last month getting up to speed on MySQL. One of the nice perks of working at Pythian is the ability ...

Oracle

Comparing Oracle Database Appliance and Exadata

Introduction Oracle Database Appliance (ODA) is in many ways similar to an Exadata quarter rack: they both use two ...

Oracle

Oracle: Delete and Re-Insert a Row in the Same Statement

It’s probably worth some explanation to understand where I want to drive you: when you run an update in Oracle, the ...

Oracle

Oracle GoldenGate Extract Internals, Part III

This is the third post in the Oracle GoldenGate Extract Internals series (links to part I and part II). In this post, ...

Oracle

Oracle GoldenGate Extract Internals, Part I

Since GoldenGate has been declared as a strategic direction for replication technology by Oracle, it sounds like it’s ...

MySQL

How to Run a Streaming Backup with innobackupex

On many of our clients, we have a need to run XtraBackup as a regular OS user. Aside from running into the issue where ...

Oracle

A grand tour of Oracle Exadata, Part 2

After covering hardware components of Sun Oracle Database Machine in part 1, our grand tour continues with a look at ...

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Pythian Marketing

Posts by Pythian Marketing

SQL Server: More light shed on "non-yielding scheduler" and Indexes stats

Secrets of Oracle's Automatic Degree of Parallelism

Quick Install Guide for Oracle 10g Release 2 on Mac OS X Leopard & Snow Leopard

SQL server:opening errorlog:Failed to retrieve data for this request

Oracle 11gR2 Grid Infrastructure -- Memory Footprint

Why are your indexes larger than your actual data?

InnoDB error: Total number of locks exceeds the lock table size

Exporting the mysql.slow_log table into slow query log format

How and why tmp_table_size and max_heap_table_size are bounded.

Exadata's Best Kept Secret: Storage Indexes

Exadata TPC Benchmarks

Cloning Oracle Home from RAC to Stand-Alone

How to Dynamically Call PL/SQL Procedure in Oracle

Running querys against multiple SQL Server AND Oracle instances

Unofficial Oracle Database Appliance FAQ

How I Find MySQL Fragmentation

SQL server: Create missing indexes with unmessing names

Patching an 11gR2 Grid Infrastructure Home

Rounding Errors in MYSQL with DECIMAL Type

How To Access MySQL from Oracle With ODBC and SQL

Check URL status from SQL server

Change Views DEFINER Without ALTER VIEW: How to Fix Thousands of Views

Exadata smart scans and the flash cache

Notes on Learning MySQL (as an Oracle DBA)

Comparing Oracle Database Appliance and Exadata

Oracle: Delete and Re-Insert a Row in the Same Statement

Oracle GoldenGate Extract Internals, Part III

Oracle GoldenGate Extract Internals, Part I

How to Run a Streaming Backup with innobackupex

A grand tour of Oracle Exadata, Part 2

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