Re: [GENERAL] Determine size of table before it's committed?

2017-10-11 Thread Melvin Davidson 
On Wed, Oct 11, 2017 at 9:43 AM, Seamus Abshere  wrote:

> hi,
>
> I've had an `INSERT INTO x SELECT FROM [...]` query running for more
> then 2 days.
>
> Is there a way to see how big x has gotten? Even a very rough estimate
> (off by a gigabyte) would be fine.
>
> Best,
> Seamus
>
>
> --
> Seamus Abshere, SCEA
> https://www.faraday.io
> https://github.com/seamusabshere
> https://linkedin.com/in/seamusabshere
>
>
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>

>Is there a way to see how big x has gotten?...

Try:

SELECT n.nspname as schema,
   c.relname as table,
   a.rolname as owner,
   c.relfilenode as filename,
   c.reltuples::bigint,
   pg_size_pretty(pg_relation_size(n.nspname|| '.' || c.relname)) as
size,
   pg_size_pretty(pg_total_relation_size(n.nspname|| '.' || c.relname))
as total_size,
   pg_relation_size(n.nspname|| '.' || c.relname) as size_bytes,
   pg_total_relation_size(n.nspname|| '.' || c.relname) as
total_size_bytes,
   CASE WHEN c.reltablespace = 0
THEN 'pg_default'
ELSE (SELECT t.spcname
FROM pg_tablespace t WHERE (t.oid = c.reltablespace)
)
END as tablespace
FROM pg_class c
  JOIN pg_namespace n ON (n.oid = c.relnamespace)
  JOIN pg_authid a ON ( a.oid = c.relowner )
  WHERE relname = 'x'
ORDER BY total_size_bytes DESC, 1, 2;

-- 
*Melvin Davidson*
I reserve the right to fantasize.  Whether or not you
wish to share my fantasy is entirely up to you.

Re: [GENERAL] Determine size of table before it's committed?

2017-10-11 Thread Justin Pryzby 
On Wed, Oct 11, 2017 at 10:43:26AM -0300, Seamus Abshere wrote:
> I've had an `INSERT INTO x SELECT FROM [...]` query running for more
> then 2 days.
> 
> Is there a way to see how big x has gotten? Even a very rough estimate
> (off by a gigabyte) would be fine.

On linux:

Run ps -fu postgres (or SELECT pid, query FROM pg_stat_activity) and
look at: ls -l /proc/PID/fd

writing to XX.22 means it's written ~22GB.

You can also SELECT relfilenode FROM pg_class WHERE oid='x'::regclass (or
relname='x').

Or try using strace (but beware I've seen its interruption to syscalls change
the behavior of the program being straced).

Justin


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[GENERAL] Determine size of table before it's committed?

2017-10-11 Thread Seamus Abshere 
hi,

I've had an `INSERT INTO x SELECT FROM [...]` query running for more
then 2 days.

Is there a way to see how big x has gotten? Even a very rough estimate
(off by a gigabyte) would be fine.

Best,
Seamus


--
Seamus Abshere, SCEA
https://www.faraday.io
https://github.com/seamusabshere
https://linkedin.com/in/seamusabshere


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