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Re: [PERFORM] [ADMIN] 2 server with same configuration but huge difference in performance - Mailing list pgsql-performance

From Keith
Subject Re: [PERFORM] [ADMIN] 2 server with same configuration but huge difference in performance
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Msg-id CAHw75vveLeAga5_0t7ze=jMcJrX3796f9d9iLbWF2_yLyTxFBg@mail.gmail.com
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In response to [PERFORM] 2 server with same configuration but huge difference in performance  (Sumeet Shukla <sumeet.k.shukla@gmail.com>)
Responses Re: [PERFORM] [ADMIN] 2 server with same configuration but hugedifference in performance  (Anthony Sotolongo <asotolongo@gmail.com>)
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On Tue, Aug 1, 2017 at 9:41 AM, Sumeet Shukla <sumeet.k.shukla@gmail.com> wrote:
Hi,

I have 2 PG servers with same h/w and configuration and they are not in replication.

On server A it takes 20 minutes to execute the script.
On server B it takes more than 20 hours. (Seems to be stuck with create index and and create foreign key steps)

Any guidance to troubleshoot this would be highly appreciated.

Thanks & Regards,
Sumeet Shukla


Check for long running queries on the server that is taking longer. If it's things like CREATE INDEX or ALTER TABLE statements that are being blocked, a transaction running on the table involved will cause those commands to be held until those transactions complete.

If it's normal read/write queries to that are taking longer, ensure the database statistics are up to date by running an analyze.

Keith

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