Re: Multiple COPY on the same table

On 08/20/2018 08:56 AM, Nicolas Paris wrote:
>> Can I split a large file into multiple files and then run copy using
>> each file.
> 
> AFAIK, copy command locks the table[1] while there is no mention of this
> in the documentation[2].

[1] Is from Postgres 7.1(17 years ago). I suspect the conditions have 
changed at least a little:).

> 
>>   Will the performance boost by close to 4x??
> 
> You might be interested in the pbBulkInsert tool[3] that allows parallel
> copy with some succes accordingly to benchmarks. However, that tool does
> not handle multiline csv. Because of that limitation I have been using
> the standard copy command with binary format with some succes.
> 
> 
> [1] https://grokbase.com/t/postgresql/pgsql-general/01597pv3qs/copy-locking
> [2] https://www.postgresql.org/docs/current/static/sql-copy.html
> [3] https://github.com/bytefish/PgBulkInsert
> 
> 


-- 
Adrian Klaver
adrian.klaver@aklaver.com