Table ‘sessions’ is marked as crashed and should be repaired

As it is clear from the error, problem lies in sessions table. Sessions table contains the login sessions.

The solution to this problem is to Empty the sessions table. To do so login into phpMyAdmin, select the sessions table and click on Empty.

You have nothing to loose except that logged in users will be kicked out and they will have to log back in. There might be some errors as well.

One problem I faced was that the admin password was reset to the previous password which is weird. I’ve no clue why this happened.

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warning: Parameter 1 to comment_nodeapi() expected to be a reference, value given in /includes/module.inc on line 462.

This is very typical error with PHP 5.3 and happens with most of the php scripts and not only Drupal.

The solution for above problem is to remove & from the function comment_nodeapi(&$node, $op, $arg = 0) in comment.module file which is in /modules/comment folder.

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Warning: Cannot modify header information – headers already sent by (output started at /home/../public_html/includes/database.mysql.inc:128) in /home/…/public_html/includes/bootstrap.inc on line 636

Warning: Cannot modify header information – headers already sent by (output started at /home/…/public_html/includes/database.mysql.inc:128) in /home/…/public_html/includes/bootstrap.inc on line 637

Warning: Cannot modify header information – headers already sent by (output started at /home/…/public_html/includes/database.mysql.inc:128) in /home/…/public_html/includes/bootstrap.inc on line 638

Warning: Cannot modify header information – headers already sent by (output started at /home/…/public_html/includes/database.mysql.inc:128) in /home/…/public_html/includes/bootstrap.inc on line 639

This error is gone either when I empty Drupal Cache.
There is one more similar problem

warning: Cannot modify header information – headers already sent by (output started at /home/…/public_html/includes/database.mysql.inc:128) in /home/…/public_html/includes/common.inc on line 148.

I checked the common.inc, database.mysql.inc and database.mysql.inc files but I found nothing to suspect. In most cases it is related to error checking or cache.

Error checking seems to be normal and nothing unusual about it.

What about Drupal Cache? Not sure what is causing problem here.

There is a discussion on this topic on Drupal. The suggestions given there is related with the empty space at the end of file and any modules which might be causing problem. However I haven’t installed any new module or changed anything recently in these modules.

So for a quick check I checked these common files and removed any space at the end of file. Top do so open the file in any text editor, put cursor at the last character and hit DEL key repeatedly.

Will wait and see if it solves the problem.

There is a another suggestion related to output_buffering on/off in your php.ini Someone solved this problem by changing OUTPUT_BUFFER=OFF to OUTPUT_BUFFER=ON.

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1. Drupal is the one of the slowest CMS which I’ve ever come across
2. The more modules you add the slower it gets
3. Drupal itself is slow so changing server or moiving to Drupal will not help a lot

The biggest problem with Drupal is that with raw core you can’t build a website or portal and you need to have loads of modules installed to give it a shape.

With modules come CSS, JS, Images and, of course, php files which all adds up to slow down Drupal. Then top up that with the theme files (CSS, JS, Images and PHP files) and you end up with a monster. Something like Indian passenger trains which almost don’t move due to overloading (remember seeing pictures of people sitting on top if train in India).

However there is hope on the horizons, there are few ways by which you can speed up Drupal up to certain extent.

Drupal Health Checkup

First do a basic health checkup for your Drupal site. You need a stethoscope which is YSlow Firefox Extension.

You can also try Google Page Speed extension for firefox.

1) Get a Dedicated Server

Opps!! Didn’t I say in the beginning of this post that Dedicated server wouldn’t help? Yes I did. But you can’t run Drupal on a shared hosting. It is like driving Rolls Royce on Indian roads. It will run however you can imagine what harm it will do you your health if you haver driven in Indian roads.

So get a good dedicated server first.

Check out Web Hosting Reviews for more details on why shared hosting sucks.

Server Side Optimization
Enable mod_gzip (Apache 1.3)/ mod_deflate (Apache 2.x).

2) Enable CSS and JS Compression/Aggregation

Drupal 6 onwards has inbuilt capability to Aggregate (combine) Java Script and CSS files. You can enable it from

Administer -> Site Configuration -> Performance

“Caching mode:”

Select Aggressive

Speed Up Drupal

Check Enable options on “Optimize CSS files” and “Optimize JavaScript files:”

3) GZIP – configure your Apache server to automatically compress files.

Add following line in .htaccess file

AddOutputFilterByType DEFLATE text/css application/x-javascript

Install Boost module

Boost module claims to improve the performance significantly.

I’m yet to test this module, once I’ve done it I’ll upadate.

5) Follow Basic CSS/HTML Guidelines

Not to mention go back to school and re-read the basic CSS/HTML guidelines again.

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• Free Open source
• Flexible
• Extensible
• Supports MVC
• Community Support

Visit CMS Reviews website for a comprehensive review on Content Management Systems

Current Drupal Version

Drupal 6.14 is the latest stable version.

Download Drupal 6.14

Drupal Modules

Visit Drupal Module page

Some of most popular dupal modules

1) Views

One of the most popular Drupal Module which allows the flexibility to display the list, tables and contents and other elements.

2) CCK (Content Construction Kit)

CCK module allows you to add custom fields to nodes from web browser.

Some of the useful CCK links.

Content Construction Kit Handbook

Getting Started with CCK

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