Re: Working around, or with, bitmap heap scan?

2018-11-02 Thread James A. Robinson
On Fri, Nov 2, 2018 at 6:21 AM Laurenz Albe wrote: > I have no idea how to improve that, sorry. Heh, thank you for looking. From your response I've got a vision of a medical drama where the doctor looks over some test results and sadly informs the patient "I'm sorry, there's nothing more we can

Re: Working around, or with, bitmap heap scan?

2018-11-02 Thread Laurenz Albe
On Fri, 2018-11-02 at 04:55 -0700, James A. Robinson wrote: > Well, so as to not spam the list here's a link to a folder with copies > of the output: I have no idea how to improve that, sorry. Yours, Laurenz Albe -- Cybertec | https://www.cybertec-postgresql.com

Re: Working around, or with, bitmap heap scan?

2018-11-02 Thread James A. Robinson
Well, so as to not spam the list here's a link to a folder with copies of the output: https://drive.google.com/open?id=1lSlx7UMUMNgRft2B3Rq2zc4WIRJLLOqU On Fri, Nov 2, 2018 at 4:12 AM James A. Robinson wrote: > > Thank you. Do you need the entire output of 'EXPLAIN (ANALYZE, > BUFFERS) ...', or

Re: Working around, or with, bitmap heap scan?

2018-11-02 Thread James A. Robinson
Thank you. Do you need the entire output of 'EXPLAIN (ANALYZE, BUFFERS) ...', or will just the sub-section, as I emailed for the plain 'EXPLAIN ...' I initially e-mailed. do?

Re: Working around, or with, bitmap heap scan?

2018-11-02 Thread Laurenz Albe
James A. Robinson wrote: > Thank you. Do you need the entire output of 'EXPLAIN (ANALYZE, > BUFFERS) ...', or will just the sub-section, as I emailed for the > plain 'EXPLAIN ...' I initially e-mailed. do? It should be the whole thing. Yours, Laurenz Albe -- Cybertec |

Re: Working around, or with, bitmap heap scan?

2018-11-02 Thread Laurenz Albe
James A. Robinson wrote: > I'm newly exposed to a Postgres 9.4 database system, and am > trying to understand how I might optimize a query that is taking > a long time to return. > > What I'm observing is an uncached query that takes much much > longer to complete, sometimes minutes longer, when

Working around, or with, bitmap heap scan?

2018-10-31 Thread James A. Robinson
Hello, I'm newly exposed to a Postgres 9.4 database system, and am trying to understand how I might optimize a query that is taking a long time to return. What I'm observing is an uncached query that takes much much longer to complete, sometimes minutes longer, when enable_bitmapscan is true.