Magento Site Performance Optimization

Tuning, Scaling, and Replicating MySQL
Magento uses many indexes in order to access easily to, for example, rules for each
product each time they are added to the basket of each customer. Indexes are very
important in Magento and can be managed from the admin panel by navigating to
System | Index Management. In this menu, each table that is in need of a reindexing
will appear in red. You can reindex a table by selecting the table, selecting Reindex
in the upper-right corner, and clicking on the Submit button. Here is a screenshot of
the table after indexation:
Truncating some tables for performance
The logging system for user interactions with your e-commerce website is
exclusively based on MySQL. This means that whatever your users are doing on
your website, their actions are stored in your MySQL database. On one hand, it's a
very handy way of informing you what your user is looking for in your store and to
adjust yourself to fit your customers' needs, but on the other hand, this information
comes with an incredibly heavy weight. On average, these data weigh 1 MB per
visitor per month. Knowing that, doing the math is fairly easy, 1,000 visitor/month
weigh 1 GB of logs in your MySQL database. Needless to say, the heavier the
database becomes, the slower your data will be served. Therefore, you should dump
that log from time to time in order to learn about your customers from them, and
also, delete them on a monthly basis.
The following are the commands to truncate a table:
$ mysql –user magento-user –password
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