在 4 个 Debian 8 Jessie 服务器上，我有 PostgreSQL 9.4.3 master + 3 slaves。在 master 上的大量数据更改后，slave 日志显示此错误：
LOG: started streaming WAL from primary at 182/0 on timeline 1
FATAL: could not receive data from WAL stream: ERROR: requested WAL segment 000000010000018200000000 has already been removed
我需要哪些步骤来恢复/重建从站？