Log Message:
-----------
Adjust max_standby_delay documentation to be clearer, and mention that
two adjacent long-running queries have much less than max_standby_delay
before query cancel is possible.
Modified Files:
--------------
pgsql/doc/src/sgml:
config.sgml (r1.257 -> r1.258)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/config.sgml?r1=1.257&r2=1.258)