On 30.10.2018 17:05, Michael Tremer wrote:
On Tue, 2018-10-30 at 15:37 +0100, Matthias Fischer wrote:
On 30.10.2018 15:03, Michael Tremer wrote:
Hey,
Hello,
do you have any idea why the redirector is busy?
Sorry: no. Long time ago, I searched for an optimal value but didn't find any useful links. Right now, I'm testing 'squid 4.4" and its always the same. Too few redirectors => warning.
I only found something like "If you see this warning, you should increase the number of child processes and restart (or reconfigure) Squid. If the queue size becomes twice the number of redirectors, Squid aborts with a fatal message."
The last bit is not very good. Why does squid not queue the requests long enough? That means even CPU cores * 2 or 4 won't be enough. On a single-core machine that would only be 2 requests. LOL
Looking at the options that we have ( http://www.squid-cache.org/Doc/config/url_rewrite_children/), could you please test this:
url_rewrite_children X startup=N idle=N queue-size=64
With N being the number of cores that your system has. I do not think that there is any point in trying to run more than N queries at a time.
But squid doesn't start anything when it starts up. startup= changes that and idle= makes sure that all processes remain active.
Yep. I had this already in my 'proxy.cgi'.
I applied the patches again and changed the 'url_rewrite_children'-line in 'proxy.cgi' to read:
print FILE "url_rewrite_children ", &General::number_cpu_cores()," startup=2 idle=2 queue-size=64\n\n";
This leads to this line in 'squid.conf': url_rewrite_children 2 startup=2 idle=2 queue-size=64
No warnings so far. Testing ...
Best, Matthias
A queue size of 64 seems sensible to me because that is probably what the average tabloid newspaper page has. Maybe it should be 16 * N or so...
-Michael
Taken from:
http://etutorials.org/Server+Administration/Squid.+The+definitive+guide/Chap...
So my current "40"-value was found through "try and look if the warning comes again"...
Best, Matthias
-Michael
On Tue, 2018-10-30 at 14:54 +0100, Matthias Fischer wrote:
Hi,
I tested this patch today and I fear the resulting value is too low.
For me, its leads to:
***SNIP*** ... 2018/10/30 14:42:43 kid1| WARNING: All 2/2 redirector processes are busy. 2018/10/30 14:42:43 kid1| WARNING: 4 pending requests queued 2018/10/30 14:42:43 kid1| WARNING: Consider increasing the number of redirector processes in your config file. ...
Current setting is "40" (Duo box, 2 Cores, 'squidclamav, squidguard)
Best, Matthias
On 30.10.2018 12:06, Daniel Weismüller wrote:
I added a function to determine the number of cores. Now the number of squid processes will be equal to the number of logical cores. Further I removed the possibility of changing the number of squid processes in the proxy.cgi
Signed-off-by: Daniel Weismüller daniel.weismueller@ipfire.org
config/cfgroot/general-functions.pl | 7 +++++++ html/cgi-bin/proxy.cgi | 16 ++-------------- 2 files changed, 9 insertions(+), 14 deletions(-)
diff --git a/config/cfgroot/general-functions.pl b/config/cfgroot/general- functions.pl index 0577afe28..e8495e885 100644 --- a/config/cfgroot/general-functions.pl +++ b/config/cfgroot/general-functions.pl @@ -1165,5 +1165,12 @@ sub dnssec_status() {
return $status; } +sub number_cpu_cores() {
- open my $cpuinfo, "/proc/cpuinfo" or die "Can't open cpuinfo:
$!\n";
- my $cores = scalar (map /^processor/, <$cpuinfo>);
- close $cpuinfo;
- return $cores;
+}
1; diff --git a/html/cgi-bin/proxy.cgi b/html/cgi-bin/proxy.cgi index 738425b9a..92bebfe18 100644 --- a/html/cgi-bin/proxy.cgi +++ b/html/cgi-bin/proxy.cgi @@ -287,7 +287,6 @@ $proxysettings{'IDENT_USER_ACL'} = 'positive'; $proxysettings{'ENABLE_FILTER'} = 'off'; $proxysettings{'ENABLE_UPDXLRATOR'} = 'off'; $proxysettings{'ENABLE_CLAMAV'} = 'off'; -$proxysettings{'CHILDREN'} = '10';
$ncsa_buttontext = $Lang::tr{'advproxy NCSA create user'};
@@ -437,11 +436,6 @@ if (($proxysettings{'ACTION'} eq $Lang::tr{'save'}) || ($proxysettings{'ACTION'} $errormessage = $Lang::tr{'invalid maximum incoming size'}; goto ERROR; }
if (!($proxysettings{'CHILDREN'} =~ /^\d+$/) ||($proxysettings{'CHILDREN'} < 1))
- {
$errormessage = $Lang::tr{'advproxy invalid num ofchildren'};
goto ERROR;- } if ($proxysettings{'ENABLE_BROWSER_CHECK'} eq 'on') { $browser_regexp = '';
@@ -1034,12 +1028,8 @@ print <<END
</table> <hr size='1'> <table width='100%'> -<tr><td class='base' colspan='4'><b>$Lang::tr{'advproxy redirector children'}</b></td></tr> -<tr><td class='base' >$Lang::tr{'processes'}: <img src='/blob.gif' alt='*' /><input type='text' name='CHILDREN' value='$proxysettings{'CHILDREN'}' size='5' /></td> END ; -my $count = `ip n| wc -l`; -if ( $count < 1 ){$count = 1;} if ( -e "/usr/bin/squidclamav" ) { print "<td class='base'><b>".$Lang::tr{'advproxy squidclamav'}."</b><br />"; if ( ! -e "/var/run/clamav/clamd.pid" ){ @@ -1048,18 +1038,16 @@ if ( -e "/usr/bin/squidclamav" ) { } else { print $Lang::tr{'advproxy enabled'}."<input type='checkbox' name='ENABLE_CLAMAV' ".$checked{'ENABLE_CLAMAV'}{'on'}." /><br />"; - print "+ ".int(( $count**(1/3)) * 8);} +} print "</td>"; } else { print "<td></td>"; } print "<td class='base'><a href='/cgi- bin/urlfilter.cgi'><b>".$Lang::tr{'advproxy url filter'}."</a></b><br />"; print $Lang::tr{'advproxy enabled'}."<input type='checkbox' name='ENABLE_FILTER' ".$checked{'ENABLE_FILTER'}{'on'}." /><br />"; -print "+ ".int(($count**(1/3)) * 6); print "</td>"; print "<td class='base'><a href='/cgi- bin/updatexlrator.cgi'><b>".$Lang::tr{'advproxy update accelerator'}."</a></b><br />"; print $Lang::tr{'advproxy enabled'}."<input type='checkbox' name='ENABLE_UPDXLRATOR' ".$checked{'ENABLE_UPDXLRATOR'}{'on'}." /><br />"; -print "+ ".int(($count**(1/3)) * 5); print "</td></tr>"; print <<END </table> @@ -4095,7 +4083,7 @@ END if (($proxysettings{'ENABLE_FILTER'} eq 'on') || ($proxysettings{'ENABLE_UPDXLRATOR'} eq 'on') || ($proxysettings{'ENABLE_CLAMAV'} eq 'on')) { print FILE "url_rewrite_program /usr/sbin/redirect_wrapper\n"; - print FILE "url_rewrite_children $proxysettings{'CHILDREN'}\n\n"; + print FILE "url_rewrite_children ", &General::number_cpu_cores(), "\n\n"; }
# Include file with user defined settings.