lrwxrwxrwx 1 postgres dba 32 Jul 26 07:21 check_postgres_disabled_triggers -> /usr/local/bin/check_postgres.pl lrwxrwxrwx 1 postgres dba 32 Jul 26 07:21 check_postgres_disk_space -> /usr/local/bin/check_postgres.p 使用 [postgres@t1ysl bin]$ ./check_postgres_txn_idle --port=6000...
对于MAIN_FORK 的 0 个文件,会将其保留防止其他表重用文件名,并且将文件内容截取(truncate)到 0,然后发送请求给 checkpointer 进程,让其在下一次 checkpoint 之后再实际删除该文件,关键代码如下: /* Prevent other backends' fds from holding on to the disk space */ ret = do_truncate(path); /* Register...
对于MAIN_FORK 的 0 个文件,会将其保留防止其他表重用文件名,并且将文件内容截取(truncate)到 0,然后发送请求给 checkpointer 进程,让其在下一次 checkpoint 之后再实际删除该文件,关键代码如下: /* Prevent other backends' fds from holding on to the disk space */ ret = do_truncate(path); /* Register...
lrwxrwxrwx 1 postgres dba 32 Jul 26 07:21 check_postgres_disabled_triggers -> /usr/local/bin/check_postgres.pl lrwxrwxrwx 1 postgres dba 32 Jul 26 07:21 check_postgres_disk_space -> /usr/local/bin/check_postgres.p 使用 [postgres@t1yslbin]$ ./check_postgres_txn_idle --port=6000 ...
在Postgres 中,在对表文件管理和操作时,提供了存储管理器(SMGR)的抽象,由于历史原因,早期的系统中,可能存在不同的存储系统,比如磁盘(magnetic disk)、索尼光盘(Sony WORM optical disk jukebox)、持久化主存(persistent main memory)等。 但是目前在操作系统层面,已经提供了文件系统的抽象,所以存储管理器其实已经没有...
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在PostgreSQL中运行系统命令并在插入中使用返回值是通过使用外部可执行程序和PL/pgSQL函数结合实现的。 首先,需要创建一个PL/pgSQL函数来执行系统命令并返回结果。可以使用`plpy...
Why is that query so slow? Are my indexes being used? Where is all my disk space going? These are hard questions to answer. You could ask anexpensivedatabase expert but there is another way. Magistrate is the tool to help developers understand their Postgres databases. ...
Server resources (memory/disk space/network ports opened between source and destination) Operating system Data migration software and related drivers installed and configured It should go without saying that your target server resources are large enough and have the scalability to han...
The same applies to EDB Postgres for Kubernetes and Kubernetes as well: the"Monitoring" sectionprovides details on checking the disk space used by WAL segments and standard metrics on disk usage exported to Prometheus. Important In a production system, it is critical to monitor the database conti...