Re: Squid File descriptors warning

"L.P.H. van Belle" <belle@xxxxxxxxx> · Tue, 7 Aug 2018 10:44:03 +0200

I do know there is/was a bug the systemd isnt picking 
up the filedescriptors with systemd, you might have hit it. 

Im 
suspecting your start script is a sysv script invoked by systemd. 

Try to set the limits within the start script (sysv) so 
the correct users ( running squid ) gets the 
filedescriptors.

I run Debian 9, with a recompiled squid from debian sid 
and that work fine for me atm. 
If you use the 4.1 from sid, add the 
following changes also. 

/etc/logrotate.d/squid 

postrotate

if [ -d /run/systemd/system ] && command systemctl >/dev/null 
2>&1 && systemctl is-active --quiet squid.service; 
then

systemctl restart 
squid.service

elif [ -f /var/run/squid.pid ]; 
then

test ! -e /var/run/squid.pid || test ! -x /usr/sbin/squid || /usr/sbin/squid -k 
rotate

fi
        endscript

Try the following and the below the command created 
the file /etc/systemd/system/squid.service.d/override.conf 
Add there the 
following. 

systemctl edit squid
[Unit]
After=network.target 
network-online.target nss-lookup.target
Wants=network-online.target

[Service]
LimitNOFILE=8192:65535
User=proxy
Group=proxy

Greetz, 

Louis

  Van: squid-users 
  [mailto:squid-users-bounces@xxxxxxxxxxxxxxxxxxxxx] Namens Alex 
  K
Verzonden: dinsdag 7 augustus 2018 9:46
Aan: 
  squid-users@xxxxxxxxxxxxxxxxxxxxx
Onderwerp:  Squid 
  File descriptors warning

  Hi all, 

  I observed the following warning at squid cache logs: 

  WARNING! Your cache is 
  running out of filedescriptors

  Googling around I tried to increase the default file descriptors of the 
  system (I am runnign Debian9 x64 bit), by setting at /etc/sysctl.conf: 

  fs.file-max=802762

  Restarted system. Still was receiving the warnings. 

  When checking further I observed that I have the following default 
  limits: 

  ulimit -a
core file 
  size          (blocks, -c) 
  0
data seg size           
  (kbytes, -d) unlimited
scheduling 
  priority             
  (-e) 0
file 
  size               
  (blocks, -f) unlimited
pending 
  signals                 
  (-i) 15338
max locked memory       (kbytes, 
  -l) 64
max memory size         
  (kbytes, -m) unlimited
open 
  files                      
  (-n) 1024
pipe 
  size            (512 
  bytes, -p) 8
POSIX message queues     (bytes, -q) 
  819200
real-time 
  priority              
  (-r) 0
stack 
  size              
  (kbytes, -s) 8192
cpu 
  time               
  (seconds, -t) unlimited
max user 
  processes              
  (-u) 15338
virtual 
  memory          (kbytes, -v) 
  unlimited
file 
  locks                      
  (-x) unlimited

  Where the "open files" seems to be the related one. 

  I set also the following at squid conf: 

  max_filedescriptors 
  65535

  I am running a compiled version 3.5.23. 

  I am not sure I have done the correct steps or if I need to tweak the 
  ulimits also.

  Any experience from your side?

  Thanx, 

  alex

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