Обсуждение: Postgresql Upgrade from 10 to 14
Hi Team,
I need some help or suggestions for the below issue. Please provide answers what to do now. We re in critical position to handle the issue.
Issue: We upgraded postgresql from 10 to 14 version, post to the upgrade , queries are running very slower than normal expected time. As well as the queries are not getting completed . We did vacuum analyze, index recreation and analyze statements etc but no luck still the job queries are running slower like 10hrs , 14hrs . So please help what we need to do to fix the issue.
Actually we have spark scala application that will use JDBC driver to make connection to the postgresql and then execute the queries. Before upgrade the same application used to complete in very lesser time like 10mts but now its taking 14hrs and not getting completed.
Not sure why upgrade making slower in performance. Previously the job used to complete in lesser time.
Please advise and provide suggestion what inorder to do fix the issue. Kindly help and waiting for good reply with exact solutions
On 4/8/23 18:03, thayanban thay wrote: > Hi Team, > > I need some help or suggestions for the below issue. Please provide > answers what to do now. We re in critical position to handle the issue. > > Issue: We upgraded postgresql from 10 to 14 version, post to the upgrade > , queries are running very slower than normal expected time. As well as > the queries are not getting completed . We did vacuum analyze, index > recreation and analyze statements etc but no luck still the job queries > are running slower like 10hrs , 14hrs . So please help what we need to > do to fix the issue.- > > Actually we have spark scala application that will use JDBC driver to > make connection to the postgresql and then execute the queries. Before > upgrade the same application used to complete in very lesser time like > 10mts but now its taking 14hrs and not getting completed. > > Not sure why upgrade making slower in performance. Previously the job > used to complete in lesser time. > > Please advise and provide suggestion what inorder to do fix the issue. > Kindly help and waiting for good reply with exact solutions More information needed: 1) OS and version? 2) Where is server hosted, on your machines or a service? 3) The hardware specifications for the machine? 4) How was the upgrade done? 5) An example of a slow query with the output of EXPLAIN <the_query> 6) What version of the JDBC driver? -- Adrian Klaver adrian.klaver@aklaver.com
thayanban thay <thayanban96@gmail.com> writes: > Issue: We upgraded postgresql from 10 to 14 version, post to the upgrade , > queries are running very slower than normal expected time. As well as the > queries are not getting completed . We did vacuum analyze, index recreation > and analyze statements etc but no luck still the job queries are running > slower like 10hrs , 14hrs . So please help what we need to do to fix the > issue. You are unlikely to get any useful advice when you've provided no details. You need to identify which query or queries has gotten slower, and post the problem queries along with related table schemas and EXPLAIN output. See https://wiki.postgresql.org/wiki/Slow_Query_Questions for some advice about how to ask answerable performance questions. Just a shot in the dark: some people upgrading past v12 have found that queries using WITH got slower because WITH clauses can now be inlined whereas the previous behavior was always the equivalent of WITH ... AS MATERIALIZED. The new behavior is usually better but we have seen cases where it loses. Your issue could be something else entirely though. regards, tom lane