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Saturday, August 29, 2015

Add Color to Your SQL

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Topic:  this post is about some simple techniques to add color to SQL scripts and their terminal output using ANSI escape codes. Color...
Wednesday, July 29, 2015

Diagnose High-Latency I/O Operations Using SystemTap

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Topic: this post is about some simple tools and techniques that can be used to drill down high-latency I/O events using SystemTap probes. ...
Tuesday, July 14, 2015

Heat Map Visualization of Latency Histograms for NetApp C-Mode

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Topic: This post is about collecting and visualizing I/O latency histograms for NetApp filers in C-mode. Motivations: The drill down of...
Monday, June 15, 2015

Event Histogram Metric and Oracle 12c

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Topic:  event histogram metric, a script and some related discussions on collecting and displaying wait event latency histograms for Oracle ...
Wednesday, March 18, 2015

Heat Map Visualization of I/O Latency with SystemTap and PyLatencyMap

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Topic: PyLatencyMap v1.2  a tool for collecting and visualizing I/O latency data collected and about its integration with SystemTap. Intr...
Wednesday, February 18, 2015

Latest Updates to PerfSheet4, a Tool for Oracle AWR Data Mining and Visualization

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Topic:  This post is about the latest updates to  PerfSheet4  v3.7 (February 2015). PerfSheet4 is a tool aimed at DBAs and Oracle performanc...
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Wednesday, December 3, 2014

Talks at UKOUG TECH 2014 with CERN Speakers

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This is a short blog post with a list of the talks at the UKOUG TECH 2014 conference in Liverpool with CERN speakers. Come and say hi, we ...
Tuesday, November 4, 2014

Life of an Oracle I/O: Tracing Logical and Physical I/O with SystemTap

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Topic: This post is about tracing logical and physical reads in Oracle using SystemTap. You find here a few examples illustrating the main ...