High-water Mark for number of sessions/connections reached in Postgres - Mailing list pgsql-admin

I was wondering if we can query/obtain the high-water mark of number of sessions or connections reached in a Postgres
database.Is there a view or command that can provide this information.  The pg_stat_database shows the current number
ofconnections, but not the high-water mark a database had reached. 

Thanks in advance.

      Husam
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