ORA-00115: connection refused; dispatcher connection table is full
Cause: A connection request was refused by a dispatcher because the dispatcher cannot support any more connections.
Action: Connect to a different dispatcher, or use a dedicated server.
ORA-00115: 官方英文解释
cause: An attempt was made to open a database in an invalid state.
1. 打开数据库时，检查发现系统参数open_cats不够大导致
2. 数据库startup慢(startup之前的操作比较复杂且耗时)
3. pmon挂掉，数据库无法startup
1. 首先检查系统参数open_cats，确定是否设置够大
2. 结束startup时有没有错误出现，考虑处理之前可以把open_cats设大一点
3. 确定pmon挂掉以后，数据库状态为Read-Only和 Mounted，手动选择startup语句，如果出现这个问题，可以把open_cats设大一点