很惭愧，一直使用zabbix，但是直到今天才弄明白，原来在2.0.*版本内升级，数据库是不需要升级的。
官网上有这么一段说明：
1 Stop Zabbix server
Stop Zabbix server to make sure that no new data is inserted into database.
2 Back up the existing Zabbix database
This is a very important step. Make sure that you have a backup of your database. It will help if the upgrade procedure fails (lack of disk space, power off, any unexpected problem).
3 Back up configuration files, PHP files and Zabbix binaries
Make a backup copy of Zabbix binaries, configuration files and PHP files.
4 Install new server binaries
You may use pre-compiled binaries or .
5 Review server configuration parameters
Some parameters of zabbix_server.conf might have changed from 1.8, new parameters added. You may want to review them.
6 Upgrade the database
Before you upgrade:
- Make sure the database user has enough permissions (create table, drop table, create index, drop index)
- Make sure you have enough free disk space.
Database upgrade scripts are located in the upgrades/dbpatches/2.0/<db engine> directory. Run the scripts:
- MySQL: upgrades/dbpatches/2.0/mysql/patch.sql
- PostgreSQL: upgrades/dbpatches/2.0/postgresql/patch.sql
- Oracle: upgrades/dbpatches/2.0/oracle/patch.sql
- IBM DB2: upgrades/dbpatches/2.0/ibm_db2/patch.sql
These scripts are only for upgrading Zabbix 1.8.x to 2.0! For upgrading from earlier versions first use upgrade scripts from Zabbix 1.6.x or Zabbix 1.8.x.
7 Install new Zabbix web interface
Follow .
8 Start new Zabbix binaries
Start new binaries. Check log files to see if the binaries have started successfully
这意思是说从1.8升级至2.0该怎么做，现在最高版本是2.0.9，所以说从1.8升级至2.0的话要按照这个来操作，但是要是2.0内部版本的提升，那就可以将第六步跳过。
将来2.2推出后，我们再说2.0升级2.2的事。