PostgreSQL 在没有日志消息的情况下执行 DDL 时挂起

Question

我在 CentOS 上有 Postgresql-9.2.10。

我遇到以下错误：

DETAIL: Multiple failures --- write error might be permanent.
ERROR: could not open file "pg_tblspc / 143862353 / PG_9.2_201204301 / 16439 / 199534370_fsm": No such file or directory

发生这种情况是因为我停止了 PostgreSQL 服务，运行 pg_resetxlog 并启动了该服务。 pg_log中的日志看起来不错，服务列出也没有问题。

DML 运行良好，但不是像 CREATE TABLE 这样的 DDL 语句，否则会抛出错误消息或在 pg_log 的日志中看不到任何内容。

如果我尝试创建表，没有反应，看起来语句被锁阻塞了。

所以我尝试了以下查询来查找锁：

SELECT blocked_locks.pid AS blocked_pid,
    blocked_activity.usename AS blocked_user,
    blocking_locks.pid AS blocking_pid,
    blocking_activity.usename AS blocking_user,
    blocked_activity.query AS blocked_statement,
    blocking_activity.query AS blocking_statement
FROM pg_catalog.pg_locks blocked_locks
    JOIN pg_catalog.pg_stat_activity blocked_activity ON blocked_activity.pid = blocked_locks.pid
    JOIN pg_catalog.pg_locks blocking_locks 
ON blocking_locks.locktype = blocked_locks.locktype
    AND blocking_locks.DATABASE IS NOT DISTINCT FROM blocked_locks.DATABASE
    AND blocking_locks.relation IS NOT DISTINCT FROM blocked_locks.relation
    AND blocking_locks.page IS NOT DISTINCT FROM blocked_locks.page
    AND blocking_locks.tuple IS NOT DISTINCT FROM blocked_locks.tuple
    AND blocking_locks.virtualxid IS NOT DISTINCT FROM blocked_locks.virtualxid
    AND blocking_locks.transactionid IS NOT DISTINCT FROM blocked_locks.transactionid
    AND blocking_locks.classid IS NOT DISTINCT FROM blocked_locks.classid
    AND blocking_locks.objid IS NOT DISTINCT FROM blocked_locks.objid
    AND blocking_locks.objsubid IS NOT DISTINCT FROM blocked_locks.objsubid
    AND blocking_locks.pid != blocked_locks.pid
JOIN pg_catalog.pg_stat_activity blocking_activity ON blocking_activity.pid = blocking_locks.pid
WHERE NOT blocked_locks.granted;

Answer 1

您可能使用pg_resetxlog 破坏了 PostgreSQL 集群。你究竟是如何运行命令的？

我会从上次好的备份中恢复。