我正在使用 Amazon CloudFormation 创建一个包含 EC2 和 RDS（Postgres 9.4.4、5gb、db.m1.small）的堆栈。RDS 实例一启动就启动备份。
如何阻止 RDS 在启动时对其进行备份？
这是 Postgres 日志：
2016-01-12 22:23:31 UTC::@:[2435]:LOG: database system is ready to accept connections
2016-01-12 22:23:31 UTC::@:[2448]:LOG: autovacuum launcher started
2016-01-12 22:23:34 UTC::@:[2445]:LOG: checkpoint starting: immediate force wait flush-all
2016-01-12 22:23:34 UTC::@:[2445]:LOG: checkpoint complete: wrote 23 buffers (0.0%); 0 transaction log file(s) added, 0 removed, 0 recycled; write=0.005 s, sync=0.011 s, total=0.051 s; sync files=20, longest=0.011 s, average=0.000 s
2016-01-12 22:23:35 UTC::@:[2445]:LOG: checkpoint starting: immediate force wait
2016-01-12 22:23:35 …