Re: Recursive query performance issue

Version:

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PostgreSQL 9.1.14 on x86_64-unknown-linux-gnu, compiled by gcc (Debian 4.7.2-5) 4.7.2, 64-bit

 

Query Plan

http://explain.depesz.com/s/4s37

 

Normally, this query takes around 200-300 ms to execute.

However when several queries are run concurrently, query performance drops to 30-60 seconds.

 

 

Is the concurrency the cause or the result of the slowdown?
Are you executing the same query with the same parameters or do the parameters differ, perhaps making PostgreSQL
choose different queryplan?