[GENERAL] change the value of "unix_socket_directories" , must used "-h /xx/xx" to use the Unix domain socket

[lin]

Hi all,
     I change the value of "unix_socket_directories" in postgresql.conf ,  then 
restart the database, but it cannot connect the database used like this 
"psql -d postgres -p 5432" ,  it must given the parameter " -h /xx/xx" to use 
the Unix domain socket。
    how to fix   this issue ?


the test steps as below :
[wln@localhost postgres9.3]$ cat data/postgresql.conf | grep 
unix_socket_directories
unix_socket_directories = '/tmp/wln'    # comma-separated list of directories


[wln@localhost postgres9.3]$ psql -d postgres -p 5432
psql: could not connect to server: No such file or directory.
        Is the server running locally and accepting
        connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
[wln@localhost postgres9.3]$ psql -d postgres -p 5432 -h /tmp/wln
psql (9.3beta2)
Type "help" for help.


postgres=# \q
[wln@localhost postgres9.3]$ 


    Thanks,
     waln