Your problem screams "IO saturation".

On 2/4/21 12:07 PM, Atul Kumar wrote:
There is no error message, when I try to connect the database while running vacuumdb with 300 jobs, it gets stuck.

On Thursday, February 4, 2021, Ravi Krishna <rkrishna...@aol.com <mailto:rkrishna...@aol.com>> wrote:

    >The CPU and RAM are normal even on 300 jobs ( only 1-4% of consumption)
    >but I don’t understand one thing here that if max_connections is set
    to 700 then
    >why I am not able to connect the db. As the running jobs (300) are
    lesser than
    >half of max_connections.

    Please paste the error message


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