Azure PostgreSQL突然使用了所有存储

昨天，我一直在添加的一个“Azure Database for PostgreSQL server”数据库突然增加了其增长率，并耗尽了所有存储空间，并且当连接变成只读时，脚本报告了错误。

对磁盘上数据库大小的查询加起来不会达到18GB

如果不是我的数据库，那么什么会使用存储？我如何防止将来发生这种情况

查看日志，下午5点左右开始出现大量类似于以下内容的条目：

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我猜是硬件故障阻止了它写WAL，占用了空间，现在似乎已经恢复了：

    select pg_size_pretty(pg_database_size('database_alpha')) => '80 MB'
    select pg_size_pretty(pg_database_size('database_beta')) => '458 MB'
    select pg_size_pretty(pg_database_size('postgres')) => '8645 kB'

2018-08-26 15:52:39 UTC-5b819a84.45490-WARNING:  archiving write-ahead log file "000000010000004E000000DA" failed too many times, will try again later
2018-08-26 15:52:49 UTC-5b819a84.45490-WARNING:  archiving write-ahead log file "000000010000004E000000DA" failed too many times, will try again later
2018-08-26 15:52:56 UTC-5b819a84.45490-WARNING:  archiving write-ahead log file "000000010000004E000000DA" failed too many times, will try again later
2018-08-26 15:53:00 UTC-5b819a84.45490-WARNING:  archiving write-ahead log file "000000010000004E000000DA" failed too many times, will try again later
2018-08-26 15:53:04 UTC-5b819a84.45490-WARNING:  archiving write-ahead log file "000000010000004E000000DA" failed too many times, will try again later
2018-08-26 15:53:08 UTC-5b819a84.45490-WARNING:  archiving write-ahead log file "000000010000004E000000DA" failed too many times, will try again later
2018-08-26 15:53:11 UTC-5b819a84.45490-WARNING:  archiving write-ahead log file "000000010000004E000000DA" failed too many times, will try again later