Обсуждение: auto vacuum errors

-- 
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Isabella A. Ghiurea 

Isabella.Ghiurea@nrc-cnrc.gc.ca
Canadian Astronomy Data Centre |http://www.nrc-cnrc.gc.ca/eng/services/hia/data-centre.html 
National Research Council of Canada, Herzberg Institute of Astrophysics 
5071 West Saanich Road, Victoria BC V9E 2E7, Canada
Phone: 250 363-3446 fax: 250 363-0045

Isabella Ghiurea <isabella.ghiurea@nrc-cnrc.gc.ca> writes:
> I'm seeing a issue with some temp tables in contrib_regression db , the
> auto vacuum job will not run for this tables  due some files/QID's
> missing  how can I fix this  ?

Um ... in general, autovacuum just silently ignores temp tables, because
it doesn't have any way to access their contents.  (One of the reasons
that temp tables are fast is that the backend owning a temp table keeps
its data in local buffers, not in shared buffers that another process
could access.)  I wouldn't expect any "missing file" complaints though.
What exactly were you seeing?

            regards, tom lane

Hi Tom ,
  Here is my error  , the missing files were removed by mistake , I have
another similar db cfg with this tables:spherrtmp% and no issues.
I 'm thinking to  restore  this tables content from this second db ,
will this  eliminate the auto vacuum error ?

07:45:59.770 PDT,,,31112,,4ff5a8a7.7988,5,,2012-07-05 07:45:59
PDT,19/2479,0,ERROR,58P01,"could not open relation 26384/247389/248165:
No such file or directory",,,,,"automatic vacuum of table
""contrib_regression.public.spheretmp5""",,,
2012-07-05 07:45:59.770 PDT,,,31112,,4ff5a8a7.7988,6,,2012-07-05
07:45:59 PDT,19/2481,0,ERROR,58P01,"could not open relation
26384/247389/248174: No such file or directory",,,,,"automatic vacuum of
table ""contrib_regression.public.spheretmp6""",,,


On 07/04/2012 09:18 PM, Tom Lane wrote:
> Isabella Ghiurea<isabella.ghiurea@nrc-cnrc.gc.ca>  writes:
>> I'm seeing a issue with some temp tables in contrib_regression db , the
>> auto vacuum job will not run for this tables  due some files/QID's
>> missing  how can I fix this  ?
> Um ... in general, autovacuum just silently ignores temp tables, because
> it doesn't have any way to access their contents.  (One of the reasons
> that temp tables are fast is that the backend owning a temp table keeps
> its data in local buffers, not in shared buffers that another process
> could access.)  I wouldn't expect any "missing file" complaints though.
> What exactly were you seeing?
>
>             regards, tom lane


--
-----------------------------------------------------------
Isabella A. Ghiurea

Isabella.Ghiurea@nrc-cnrc.gc.ca
Canadian Astronomy Data Centre |http://www.nrc-cnrc.gc.ca/eng/services/hia/data-centre.html
National Research Council of Canada, Herzberg Institute of Astrophysics
5071 West Saanich Road, Victoria BC V9E 2E7, Canada
Phone: 250 363-3446 fax: 250 363-0045

Isabella Ghiurea <isabella.ghiurea@nrc-cnrc.gc.ca> writes:
>   Here is my error  , the missing files were removed by mistake , I have
> another similar db cfg with this tables:spherrtmp% and no issues.
> I 'm thinking to  restore  this tables content from this second db ,
> will this  eliminate the auto vacuum error ?

What you ought to do is drop the tables that are reported as causing the
error.  Or the whole database --- are you actually doing something
useful in contrib_regression, or is that just left over from testing?

            regards, tom lane