Richard Hubbell wrote:
Hello Squid world,
I was trying to understand what changes would get picked up when doing a restart and I couldn't find an answer.
I've never seen any proper documentation on these.
But for the record here is what they do...
From the man page these are the -k options:
reconfigure
- reload squid.conf. closing all active connections. Including logs and
helpers. Then reopening helpers based on new configuration.
| rotate
close all open log files. rotate them (a.log becomes a.log.0 etc...) and
open new ones. follow up by purging garbage from swap.state journals
and memory indexes.
| shutdown
close all open connections. release all memory. write memory cache
indexes to journals and close. etc, etc. nice and cleanly.
| interrupt
another name for shutdown.
| kill
immediate abort of everything. hard death equivalent to 'kill -9 squid'.
can cause helpers or active clients to experience weird crashes or
errors. Or possible bad side-effects on aborted cache files when restarted.
| debug
raise debug level to "ALL,7" (almost full debugging output in cache.log)
without restarting squid.
Same as starting squid with -X option. But can be turned on any time.
| check
hmm, apparently does something but can't figure it out even from the
code. It's a SIGNULL sent to squid, but not listened for or accepted?
| parse
read squid.conf checking for errors. display any problems. dummy run, no
changes used.
| restart
wasn't in your list but is their on some squid. same as a manual stop
then start.
I am wondering if there's documentation describing which changes will get picked up by the different -k options?
Particulary I'm trying to understand memory and disk cache size settings.
If those are changed do they require a stop and start of Squid?
only -k reconfigure, -k restart, and initial startup pick up changes to
squid.conf.
cache L1/L2 settings change a stop / erase old cache / start sequence
may be needed. None has tested the effects of L1/L2 changes on the cache
dir properly.
Other memory sizes, and total cache available size only require a
reconfigure. Garbage collection will handle everything else properly.
Amos
--
Please use Squid 2.7.STABLE3 or 3.0.STABLE8
