PostgreSQL - 如何恢复非常大的数据库

Question

当我尝试在我的devel数据库节点上恢复一个大型数据库（几乎是32Go自定义格式）时，我遇到了一个小问题（这个节点的RAM，CPU比我的生产服务器少）。

我的数据库转储使用类似于以下的命令生成：

pg_dump -F custom -b myDB -Z 9 > /backup/myDB-`date +%y%m%d`.pg91

当我恢复它时，我使用以下命令：

pg_restore -F custom -j 5 -d myDB /backup/myDB-20130331.pg91

但是在这里，每次恢复命令失败时都会出现如下错误：

pg_restore: [archiver (db)] error returned by PQputCopyData: server closed the connection unexpectedly
This probably means the server terminated abnormally
    before or while processing the request.
pg_restore: [archiver] worker process failed: exit code 1
pg_restore: [archiver (db)] error returned by PQputCopyData: server closed the connection unexpectedly
This probably means the server terminated abnormally
    before or while processing the request.
pg_restore: [archiver (db)] error returned by PQputCopyData: server closed the connection unexpectedly
This probably means the server terminated abnormally
    before or while processing the request.
pg_restore: [archiver (db)] error returned by PQputCopyData: server closed the connection unexpectedly
This probably means the server terminated abnormally
    before or while processing the request.

当我检查我的postgresql日志时，我可以读到这个：

   HINT:  In a moment you should be able to reconnect to the database and repeat your command.
   LOG:  all server processes terminated; reinitializing
   LOG:  database system was interrupted; last known up at 2013-04-02 11:41:48 UTC
   LOG:  database system was not properly shut down; automatic recovery in progress
   LOG:  redo starts at 86/26F302B0
   LOG:  unexpected pageaddr 85/E3F52000 in log file 134, segment 38, offset 16064512
   LOG:  redo done at 86/26F51FC0
   LOG:  last completed transaction was at log time 2013-04-02 11:50:47.663599+00
   LOG:  database system is ready to accept connections
   LOG:  autovacuum launcher started

这很奇怪，我的postgresql服务器因为我的恢复而“重新启动”。 我尝试最小化作业数量（ -j 5选项），但仍然遇到同样的问题。 但是，在具有更好规格的节点上，恢复此数据库没有问题。 我不确定但是我的索引的更新（其中一个真的太大）可能是理解这个问题的线索？

所以我有一些问题：有没有更好的方法来恢复真正的大型数据库？ 我的pg_restore命令中是否遗漏了一些内容？ 可能是我的devel服务器的设置太低了？

任何线索将不胜感激。 预先感谢。

环境：PostgreSQL 9.1（通过Debian软件包安装）

Answer 1

对于这种大工作，建议在恢复过程中禁用autovacuum （在postgresql.conf中将其设置为off ）。

它似乎终于适合我了。