bluehost和godaddy都提供无限资源的主机，但是其实无限只是不定量限制的意思，其实还是有限制的。
Bluehost的普通套餐的限制如下：
Emails sends per hour = 750 (18,000 emails per day)
Total mySQL databases = Unlimited
Single Database Size = 2GB
Total Database Tables = 1000
Total File Count Limit = 200,000
Bandwidth Speed = 15Mbs
CPU使用限制7%-8%
http并发连接只有100
超过这个限制会被锁定账户，并被建议离开Bluehost换更高级的VPS。
Godaddy的限制如下：
Linux Web Hosting limits
- Linux Web Hosting Economy: 150 connections or more
- Linux Web Hosting Deluxe: 300 connections or more
- Linux Web Hosting Unlimited: 600 connections or more
Windows Web Hosting limits
- Windows Web Hosting Economy: 150 connections or more
- Windows Web Hosting Deluxe: 300 connections or more
- Windows Web Hosting Unlimited: 450 connections or more
MySQL connections are limited to 200 from your hosting server to the MySQL server.
MSSQL connections are limited to 100 concurrent connections.