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Dirty Cache

I/O bottlenecks

PyPGIO – An I/O generator for PostgreSQL

Bart Sjerps 2024-07-302024-11-29 Oracle, Performance, Postgres

If you need to generate lots of I/O on an Oracle database, the de-facto I/O generator tool is SLOB (Silly Little Oracle Benchmark). In the recent years however, PostgreSQL  has gotten a lot of traction and many customers are starting…

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Announcing qdda 2.0

Bart Sjerps 2018-05-142024-11-29 Innovation, Oracle, Performance

It’s almost a year since I blogged about qdda (the Quick & Dirty Dedupe Analyzer). qdda is a tool that lets you scan any Linux disk or file (or multiple disks) and predicts potential thin, dedupe and compression savings if…

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Baking a cake: trading CPU for IO?

Bart Sjerps 2016-02-01 Oracle, Performance, Virtualization

Sometimes I hear people claim that by using faster storage, you can save on database licenses. True or false? The idea is that many database servers are suffering from IO wait – which actually means that the processors are waiting…

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Oracle ASM vs ZFS on XtremIO

Bart Sjerps 2014-08-11 Oracle, Performance

Background In my previous post on ZFS I showed how ZFS causes fragmentation for Oracle database files. At the end I promised (sort of) to also come back on topic around how this affects database performance. In the meantime I…

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Getting the Best Oracle performance on XtremIO

Bart Sjerps 2014-05-21 Oracle, Performance

(Blog repost from Virtual Storage Zone – Thanks to @cincystorage) UPDATE: I’ll say it again because there seems to be some confusion: THIS IS A REPOST! Original content is from the Virtual Storage Zone blog (not mine). Just reposted here…

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Bart Sjerps

Recent Posts

  • Real performance from CPU busy: an educated guess
  • PyPGIO – An I/O generator for PostgreSQL
  • MEA: Defining Capacity and Performance Metrics
  • Maximum Efficiency Architecture: Current State
  • Reducing Oracle TCO: Maximum Efficiency Architecture

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