phpMyAdmin

phpMyAdmin is a beautiful tool. It let’s you administer a MySQL Database without all the messy commands. Also, some host don’t even allow you access to those messy commands. So, once again, it’s a beautiful tool. You can pull up a window and run individual SQL commands on the database or you can run an entire SQL script. It’s really great. There is a wonderful export tool that allows you to back up your Database as plain text SQL file or a file in GZip format. I have seen exported files get up to 10 MB compressed, which is over 100 MB decompressed, given that it’s just a plain text file.

Importing MySQL Database

But one thing that is lacking is a proper import procedure. Currently, you can import a database by pasting the SQL statements in a form and clicking submit, or by uploading an SQL file through your browser. Now that’s all well and good, but there are some problems with this method. The main problem is with timeouts. Of these there are two kinds, there are browser timeouts and server timeouts. The second problem is file size. Another limit, which you don’t often read about, is the phpMyAdmin configuration limit.

Browser TimeOuts

Browsers have a limited time that they can be busy waiting for response from the server and when doing a database import this is exactly what is happening. Your browser does a little work of uploading the file. After that it’s up to the server. So while your browser says it’s busy it really isn’t. It’s just waiting for the PHP script (phpMyAdmin) to get back to it and say it’s done. With large databases, this can take a time.

There are a couple ways to get around this. In Firefox you can go to about:config and look for the setting that deals with the browser timeouts. Honestly, I even forget what the exact property is. If you use Internet Explorer (well maybe you need to be punished) you’re out of luck, because as far as I know (which is not much about IE) I think you need to go into registry to do this. If you’re browser times out, it simply stops and kills the connection. With no active connection there script on the server comes to a halt.

Server PHP Script TimeOuts

Now let’s say you’ve gotten over the problem of the browser timeout. Good for you. Now you’re hit with something you may not have control over. A lot of shared hosts don’t allow you to modify their PHP configuration settings, for good reason. And a lot of servers have very fixed limits on the length of time that a script can run for. If this is less than what you’re file needs to run, then you’re once again out of luck. There is no work around for this though, sorry.

File Size Limit

Servers have a fixed limit with respect of the size of file that can be uploaded through the browser. Back in the day, it was stuck at 2 MB. Right now, I’ve seen them maxing out at about 8 MB on average. So what do you do if your export file is 10.5 MB? You’re out of luck, that’s what. Now why don’t they modify their export utility to break files up into multiple sizes that can be handled through import? well, it’s too much work. It’s not their problem, get a better server I guess. Once again, you’re out of luck.

phpMyAdmin Limit

phpMyAdmin has a limit in their configuration file that limits the actual number of SQL commands that can be executed. It’s that simply. If your database goes beyond this, then once again, you’re out of luck.

Well not really. You could install your own version of phpMyAdmin on the server and configure it as you like. If this works for you, great. But if your problem is also one of those mentioned above, then again, you’re out of luck.

What Are Your Options?