postgres pg_toast在autovacuum中 - 哪个表？

Question

我在pg_toast上运行了一个autovacuum进程:

select query, from pg_stat_activity where query like '%autov%';
"autovacuum: VACUUM pg_toast.pg_toast_15404513 "

我如何找出这个pg_toast所属的表/索引/什么？或者autovacuum正在处理其他事情？

Answer 1

这是一个更短的方式:

select 15404513::regclass;

在哪里15404513是pg_toast_后缀.

Answer 2

我想你会想要这样的东西:

select n.nspname, c.relname 
from pg_class c 
inner join pg_namespace n on c.relnamespace = n.oid
where reltoastrelid = (
    select oid
    from pg_class 
    where relname = 'pg_toast_15404513' 
    and relnamespace = (SELECT n2.oid FROM pg_namespace n2 WHERE n2.nspname = 'pg_toast') )

如果Pg在真空命令摘要中报告这一点,那就太好了.