Getting lot of client lifetime timeout and subsequently running out of file descriptors

[Chirayu Patel <chirayu.patel@xxxxxxxxxxxxxxxxxxx>]

Hi,

I am running squid version 4.6 and have set the file descriptors limit to 5000

I get an average of 1 lakh hits daily and in a day or 2 , I start getting these messages :

Sun Aug 18 15:00:29 2019 daemon.notice squid[4906]: WARNING: Closing client connection due to lifetime timeout
Sun Aug 18 15:00:29 2019 daemon.notice squid[4906]: 172.217.160.206:443
Sun Aug 18 15:00:32 2019 daemon.notice squid[4906]: WARNING: Closing client connection due to lifetime timeout
Sun Aug 18 15:00:32 2019 daemon.notice squid[4906]: 52.114.158.52:443
Sun Aug 18 15:00:32 2019 daemon.notice squid[4906]: WARNING: Closing client connection due to lifetime timeout
Sun Aug 18 15:00:32 2019 daemon.notice squid[4906]: 172.217.160.174:443
Sun Aug 18 15:00:36 2019 daemon.notice squid[4906]: WARNING: Closing client connection due to lifetime timeout
Sun Aug 18 15:00:36 2019 daemon.notice squid[4906]: 172.217.160.174:443
Sun Aug 18 15:00:37 2019 daemon.notice squid[4906]: WARNING: Closing client connection due to lifetime timeout
Sun Aug 18 15:00:37 2019 daemon.notice squid[4906]: 172.217.160.174:443
Sun Aug 18 15:00:41 2019 daemon.notice squid[4906]: WARNING: Closing client connection due to lifetime timeout
Sun Aug 18 15:00:41 2019 daemon.notice squid[4906]: 172.217.160.174:443
Sun Aug 18 15:00:42 2019 daemon.notice squid[4906]: WARNING: Closing client connection due to lifetime timeout
Sun Aug 18 15:00:42 2019 daemon.notice squid[4906]: 172.217.166.165:443
Sun Aug 18 15:00:44 2019 daemon.notice squid[4906]: WARNING: Closing client connection due to lifetime timeout
Sun Aug 18 15:00:44 2019 daemon.notice squid[4906]: 52.37.239.109:443
Sun Aug 18 15:00:44 2019 daemon.notice squid[4906]: WARNING: Closing client connection due to lifetime timeout
Sun Aug 18 15:00:44 2019 daemon.notice squid[4906]: 52.37.239.109:443
Sun Aug 18 15:00:47 2019 daemon.notice squid[4906]: WARNING: Closing client connection due to lifetime timeout
Sun Aug 18 15:00:47 2019 daemon.notice squid[4906]: 52.37.239.109:443
Sun Aug 18 15:00:47 2019 daemon.notice squid[4906]: WARNING: Closing client connection due to lifetime timeout
Sun Aug 18 15:00:47 2019 daemon.notice squid[4906]: 52.37.239.109:443
Sun Aug 18 15:00:48 2019 daemon.notice squid[4906]: WARNING: Closing client connection due to lifetime timeout
Sun Aug 18 15:00:48 2019 daemon.notice squid[4906]: 52.37.239.109:443

------------------------------------------------------------------------------------------------

Squid Config :

http_port 3129 intercept
https_port 3131 intercept ssl-bump cert=/etc/ray/certificates/myCA.pem \
    generate-host-certificates=off dynamic_cert_mem_cache_size=2MB
## For Captive Portal    
http_port 3132 intercept
https_port 3133 intercept ssl-bump cert=/etc/ray/certificates/myCA.pem \
    generate-host-certificates=off dynamic_cert_mem_cache_size=1MB

#sslcrtd_program /usr/lib/squid/ssl_crtd -s /var/lib/ssl_db -M 4MB
#sslcrtd_children 5

# TLS/SSL bumping definitions
acl tls_s1_connect at_step SslBump1
acl tls_s2_client_hello at_step SslBump2
acl tls_s3_server_hello at_step SslBump3

# TLS/SSL bumping steps
ssl_bump peek tls_s1_connect all # peek at TLS/SSL connect data
ssl_bump splice all # splice: no active bumping
on_unsupported_protocol tunnel all

pinger_enable off
digest_generation off
netdb_filename none
ipcache_size 128
fqdncache_size 128
via off
forwarded_for transparent
httpd_suppress_version_string on
cache deny all
cache_mem 0 MB
memory_pools off
shutdown_lifetime 0 seconds

#logfile_daemon /dev/null
access_log none

#acl good_url dstdomain .yahoo.com
http_access allow all

url_rewrite_program /tmp/squid/urlcat_server_start.sh
#url_rewrite_bypass on
url_rewrite_children 1 startup=1 idle=1 concurrency=30 queue-size=10000 on-persistent-overload=ERR
#url_rewrite_access allow all
#url_rewrite_extras "%>a/%>A %un %>rm bump_mode=%ssl::bump_mode sni=\"%ssl::>sni\" referer=\"%{Referer}>h\""
url_rewrite_extras "%>a %lp %ssl::>sni"

max_filedesc 5120

coredump_dir /tmp

-----------------------------------------------------------------------

1. Should i decrease the client_lifetime ? Or should i increase the File Descriptor limit ? or adjust the timeouts 

2. Also, there is a steady increase of memory on the device.. Squid is currently installed on an Access Point which is  a resource constrained device.. Is there any way to control it..

--

Thank You

Chirayu Patel

Truecom Telesoft 

+91 8758484287

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