PostgreSQL - 如何恢復非常大的數據庫

Question

當我嘗試在我的devel數據庫節點上恢復一個大型數據庫（幾乎是32Go自定義格式）時，我遇到了一個小問題（這個節點的RAM，CPU比我的生產服務器少）。

我的數據庫轉儲使用類似於以下的命令生成：

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

當我恢復它時，我使用以下命令：

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

但是在這里，每次恢復命令失敗時都會出現如下錯誤：

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.

當我檢查我的postgresql日志時，我可以讀到這個：

   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

這很奇怪，我的postgresql服務器因為我的恢復而“重新啟動”。 我嘗試最小化作業數量（ -j 5選項），但仍然遇到同樣的問題。 但是，在具有更好規格的節點上，恢復此數據庫沒有問題。 我不確定但是我的索引的更新（其中一個真的太大）可能是理解這個問題的線索？

所以我有一些問題：有沒有更好的方法來恢復真正的大型數據庫？ 我的pg_restore命令中是否遺漏了一些內容？ 可能是我的devel服務器的設置太低了？

任何線索將不勝感激。 預先感謝。

環境：PostgreSQL 9.1（通過Debian軟件包安裝）

Answer 1

對於這種大工作，建議在恢復過程中禁用autovacuum （在postgresql.conf中將其設置為off ）。

它似乎終於適合我了。