how to add cache_dir without terminate existing squid

[johan firdianto <johanfirdi@xxxxxxxxx>]

dear guys,

i have squid that has 1 cache_dir.
I want to add another cache_dir to expand.
I already made following step
- squid existing still in service (running)
- add 2nd cache_dir to squid.conf
- comment 1rst cache_dir
- do squid -z
but it warns Squid is already running!  Process ID 15557
any idea ?

Thanks.

Johan