Search Postgresql Archives

Re: select count() out of memory

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Alvaro Herrera <alvherre@xxxxxxxxxxxxxxxxx> writes:
> tfinneid@xxxxxxxxxxxxxxxxxxxxx wrote:
>> I did a test previously, where I created 1 million partitions (without
>> data) and I checked the limits of pg, so I think it should be ok.

> Clearly it's not.

You couldn't have tested it too much --- even planning a query over so
many tables would take forever, and actually executing it would surely
have run the system out of locktable space before it even started
scanning.

The partitioning facility is designed for partition counts in the tens,
or maybe hundreds at the most.

			regards, tom lane

---------------------------(end of broadcast)---------------------------
TIP 6: explain analyze is your friend

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]
  Powered by Linux