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Displaying posts with tag: speed (reset)

How to Optimize MySQL UNION For High Speed
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Join 6100 others and follow Sean Hull on twitter @hullsean. There are two ways to speedup UNIONs in a MySQL database. First use UNION ALL if at all possible, and second try to push down your conditions. [mytweetlinks] 1. UNION ALL is much faster than UNION How does a UNION work? Imagine you have two [...]
Five More Things Deadly to Scalability
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Read the original article at Five More Things Deadly to Scalability

Join 6000 others and follow Sean Hull on twitter @hullsean. 1. Slow Disk I/O – RAID 5 – Multi-tenant EBS Disk is the grounding of all your servers, and the base of their performance. True with larger and larger main memory, much is available in cache, a server still needs to constantly read from disk [...]

For more articles like these go to Sean Hull's Scalable Startups

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    Understanding B+tree Indexes and how they Impact Performance
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    Indexes are a very important part of databases and are used frequently to speed up access to particular data item or items. So before working with indexes, it is important to understand how indexes work behind the scene and what is the data structure that is used to store these indexes, because unless you understand the inner working of an index, you will never be able to fully harness its power.
    How to test your WordPress Cache
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    How I lost 30 pounds in 2010 – a weight loss guide for developers

    Posted on December 30th, 2010 in blog, personal, zippykid.

    2010 was a great year for me, I started a new company, and it’s been profitable since month 2, I closed my consulting company, and most importantly, I lost 30 pounds, and am more mobile/agile than I was in college. I’m 32 and I feel better than I did when I was 24. I’ve talked [...]

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    How to make WordPress faster without the use of a plugin
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    When it comes to web page load time, she should always say “wow, that was fast”.

    A Quick update based on Frederick’s comment below

    ** Please do not take these tips as THE answer, this is a complement, not a replacement. I have purposely not given specifics on how to configure anything, or what value to set, because I don’t want people copy pasting things, and then having their site crashing. Regarding mod_pagespeed, I said it’s the most bang for OUR buck.. it’s not recommended in production, nor do we have it on for everyone else. **.

    Webpage load time is getting more and more important these days, if you go into

      [Read more...]
    Speed Up Your Wedding Photography Website in less than 5 minutes.
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    If you have a wedding photography website, more than likely you want to showcase your work, or the work of your colleagues. You want to do this, without putting up low quality pictures, nor do you want to make your visitors wait 20 seconds before the page loads. Here are two plugins I use for my clients to help with this.

    • The Smush.it plugin. This plugin compresses your image using the Smush.it API from Yahoo!, I’ve used it to reduce a page size from 3MB to 1.3MB, which meant that visitors were able to see the site faster, and appreciate the photographs rather than their internet connection.
    • W3 Total Cache : This is a fairly advanced plugin that makes your site use MySQL less, and also helps you off load things onto a content delivery
      [Read more...]
    [MySQL] Deleting/Updating Rows Common To 2 Tables – Speed And Slave Lag Considerations
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    Introduction

    A question I recently saw on Stack Overflow titled Faster way to delete matching [database] rows? prompted me to organize my thoughts and observations on the subject and quickly jot them down here.

    Here is the brief description of the task: say, you have 2 MySQL tables a and b. The tables contain the same type of data, for example log entries. Now you want to delete all or a subset of the entries in table a that exist in table b.

    Solutions Suggested By Others

    DELETE FROM a WHERE EXISTS (SELECT b.id FROM b WHERE b.id = a.id);
    DELETE a FROM a INNER JOIN b on a.id=b.id;
    DELETE FROM a WHERE id IN (SELECT id FROM b)

    The Problem With  [Read more...]

    Shoot in the foot
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    I've just finished reading two recent blog posts about new query optimizations in the upcoming MySQL 6.0, it's all fine and dandy but ...Looking at Correlated semi-join subqueries and PostgreSQL by S. Petrunia we can read something like Quote: The first thing we did was to take a look at PostgreSQL as it is easily available and seems to have at least decent subquery handling (or even better
    Showing entries 1 to 8

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