系统默认分配的共享内存太小，导致zabbix_server无法启动一例

某台在重启zabbix_Server<安装在ubuntu server上>后，一启动zabbix_server进程，发现端口没有成功侦听。

查看日志有报:
1717:20120915:143945.838 Starting Zabbix Server. Zabbix 1.8.10 (revision 24303).
1717:20120915:143945.838 ****** Enabled features ******
1717:20120915:143945.838 SNMP monitoring: YES
1717:20120915:143945.838 IPMI monitoring: NO
1717:20120915:143945.839 WEB monitoring: YES
1717:20120915:143945.839 Jabber notifications: YES
1717:20120915:143945.839 Ez Texting notifications: YES
1717:20120915:143945.839 ODBC: NO
1717:20120915:143945.839 SSH2 support: NO
1717:20120915:143945.839 IPv6 support: NO
1717:20120915:143945.839 ******************************
1717:20120915:143945.844 cannot allocate shared memory of size 33795295: [22] Invalid argument
1717:20120915:143945.844 cannot allocate shared memory for history cache

解决方法: http://www.zabbix.org/wiki/How_to/configure_shared_memory
将分配的内存共享空间调大
# vim /etc/sysctl.conf
kernel.shmmax = 67108864
kernel.shmall = 67108864
再次启动，解决。