MySQL Error “Too many connections”

Question

I am using MySQL 5.0 for a site that is hosted by GoDaddy (linux).

I was doing some testing on my web app, and suddenly I noticed that the pages were refreshing rea

Answer 1

I had about 18 months of dealing with this (http://ianchanning.wordpress.com/2010/08/25/18-months-of-dealing-with-a-mysql-too-many-connections-error/)

The solutions I had (that would apply to you) in the end were:

1. tune the database according to MySQLTuner.
2. defragment the tables weekly based on this post

Defragmenting bash script from the post:

#!/bin/bash

# Get a list of all fragmented tables
FRAGMENTED_TABLES="$( mysql -e `use information_schema; SELECT TABLE_SCHEMA,TABLE_NAME
FROM TABLES WHERE TABLE_SCHEMA NOT IN ('information_schema','mysql') AND
Data_free > 0` | grep -v '^+' | sed 's,t,.,' )"

for fragment in $FRAGMENTED_TABLES; do
  database="$( echo $fragment | cut -d. -f1 )"
  table="$( echo $fragment | cut -d. -f2 )"
  [ $fragment != "TABLE_SCHEMA.TABLE_NAME" ] && mysql -e "USE $database;
  OPTIMIZE TABLE $table;" > /dev/null 2>&1
done