Re: PostgreSQL 9.6 Temporary files

On 19 March 2018 18:21:42 CET, Jimmy Augustine <jimmy(dot)augustine(at)enyx(dot)fr> wrote:
>2018-03-19 18:15 GMT+01:00 Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>:
>
>> On 03/19/2018 10:12 AM, Jimmy Augustine wrote:
>>
>>
>>> On 03/19/2018 09:31 AM, Jimmy Augustine wrote:
>>>
>>> Dear Friends,
>>>
>>> I am newbie to postgresql.
>>> I have 162 GB on my database but when I check size
>of all
>>> tables, I approximately obtain 80 GB.
>>> I also see that I have 68GB of temporary files
>however
>>> I only
>>> found 2.4MB at postgres/data/base/pgsql_tmp.
>>>
>>>
>>> Exactly how did you determine this?
>>>
>>> I used this command and sum result for all database :
>>> SELECT pg_size_pretty(pg_total_relation_size('table_name'));
>>>
>>> And this for complete database :
>>> SELECT pg_size_pretty(pg_database_size('Database Name'));
>>>
>>>
>>> So where did the 68GB number for temporary files come from?
>>>
>>> I don't measure this value by my own. I was disappointed by the gap
>>> between the two queries, so I checked pgAdmin 4 and I saw this
>value.
>>>
>>
>> In what section of pgAdmin4?
>>
>In section "Statistics" when I click on my database.
>
>Or do you know what query it used?
>>
>I have found this but not sure
>
>SELECT temp_files AS "Temporary files"
> , temp_bytes AS "Size of temporary files"FROM pg_stat_database db;

That's aggregated. Not current values.

Andreas

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