I have used pg_upgrade which runs "analyze_new_cluster.sh" as post upgrade activity across all DB on cluster.
Also, I have executed manual vacuum on all individual tables. However the behavior is same until i disable the above said parameter.
Regards,
Raj
On Wed, Jan 29, 2020 at 2:33 PM Peter J. Holzer <hjp-pgsql@hjp.at> wrote:
On 2020-01-29 09:39:03 -0800, Perumal Raj wrote: > We have recently upgraded postgres from 9.2 to 11.6 and started seeing > performance issue immediately and able to fix the performance issue after > disabling parameter: enable_seqscan.
How did you upgrade?
If your upgrade involved a dump and restore, you should invoke ANALYZE for each database (I think autovacuum will analyze all tables eventually, but takes its time).
hp
-- _ | Peter J. Holzer | Story must make more sense than reality. |_|_) | | | | | hjp@hjp.at | -- Charles Stross, "Creative writing __/ | http://www.hjp.at/ | challenge!"