梦想有多远

ASM imposes the following limits:

63 disk groups in a storage system

10,000 ASM disks in a storage system

2 terabyte maximum storage for each ASM disk (the Bug 6453944 allowed larger sizes, but that led to problems, see Note 736891.1 “ORA-15196 WITH ASM DISKS LARGER THAN 2TB”)

40 exabyte maximum storage for each storage system

1 million files for each disk group

2.4 terabyte maximum storage for each file

用XMANAGER XSTART 连接LINUX服务器启用图形界面时，报错X11TransSocketINETConnect() ：can’t get address for localhost，最终确认为
/etc/hosts文件缺少127.0.0.1地址，添加上就OK

今天在导出数据文件的时候，倒着倒着就报错了
ORA-39095:Dump file space has been exhausted: Unable to allocate string bytes
Cause: The Export job ran out of dump file space before the job was completed.
Action: Reattach to the job and add additional dump files to the job restarting the job.

从报错的字面意思，一开始以为系统空间问题，但是空闲的空间还是很多的，根据提示增加了个dumpfile但是还是报错，后来查了下METALINK，可能是我的PARALLEL太高了。我从8改为4就好了。或者也可以通过增加DUMPFILE，也能解决问题。 dumpfile=hisdeliverxU%就OK。记录下

今天启动一个测试库，发现连接不上客户端，一看4个监听，就想到之前看到过文章，说10.2.0.1上有这个问题，listener.ora加入以下参数解决
SUBSCRIBE_FOR_NODE_DOWN_EVENT_ =OFF 随便记录下，以备查找