Similarly, you can droplog file groups or members from the primary database without affecting your standby database.
同样的，你可以在主库删除日志文件组或成员而不影响你的备库。
2
For this reason, it's normal to see the immortal free memory in the verbose GC logdrop without ever recovering.
出于这个原因，常常会发现冗余gc记录中的永久自由内存下降并且不会恢复。
3
Since these are existing products you should have a wealth of info, such as, log files, completion rates and times, drop out rates and drop out points, etc.