PostgreSQL – 如何恢复非常大的数据库

我的数据库转储是使用类似于以下命令生成的：

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单独“重新启动”.
我尽量减少作业的数量(-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)