WARNING! Your cache is running out of filedescriptors

[azfar]

I am getting this few times and my squid then stop working until I restart it.
my system:
squid 2.5 stable 14
RHEL 4

How do I know the current or default limit and where to increase it.

[kbukhari]

I am getting this few times and my squid then stop working until I restart it.
my system:
squid 2.5 stable 14
RHEL 4

How do I know the current or default limit and where to increase it.

define ulimit

[azfar]

hmm did it but strange thing happen to me whenever i made changes in any following thing it revert after reboot.

/proc/sys/net/ipv4/ip_conntrack_max
/proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_timeout_established
/proc/sys/net/ipv4/ip_local_port_range
ulimit -HSn

whats the problem ?

[lambda]

hmm did it but strange thing happen to me whenever i made changes in any following thing it revert after reboot.

/proc/sys/net/ipv4/ip_conntrack_max
/proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_timeout_established

you need to put the relevant entries in /etc/sysctl.conf:

Code: Select all

net.ipv4.ip_conntrack_max = whatever
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established = whatever

you can't put the ulimit stuff in there, though.

[azfar]

thanks for pointing it but what should I do to ulimit -HSn it also revert back after reboot.

[lambda]

ok, i searched around this, and found what you need. if your system is recent enough, it'll have a file named /etc/limits.conf or /etc/security/limits.conf. you can raise the fd limit in there (it's called "nofile").

i'd dealt with it in the past, but forgotten all about it.

[azfar]

yep done it and further testing.

[siddiqi8]

i got the same issue.. i just make the ulimit to 16184 and add these lines in my squid.conf file

half_closed_clients off
server_persistent_connections off
client_persistent_connections off


after that i didn't get any error

[lambda]

don't use siddiqi8's config lines. they help his server, but don't help his users.

[newbie]

Theres also one more thing that squid checks maximum open files limit at compile time and saves it permanently n never checks at its startup.

So if you have tuned this limits u must recompile squid.
The RPM based squid has default 1024 limit ,built in it , IMHO.

you can confirm that what squid has picked up by checking its cache.log.

Regards

[LinuxFreaK]

Dear azfar,
Salam,

FYI, http://bcr2.uwaterloo.ca/~brecht/servers/openfiles.html

Best Regards.

[azfar]

/proc/sys/fs/inode-nr
/proc/sys/fs/inode-state

do i need to change these files a swell

[lambda]

i don't think so. why? what have you read that tells you to change them?

[azfar]

nothing but i found following line in another article

echo 128000 > /proc/sys/fs/inode-max

but I dont have it.

[abakali]

I am getting this few times and my squid then stop working until I restart it.
my system:
squid 2.5 stable 14
RHEL 4

How do I know the current or default limit and where to increase it.

AOA
Modifying the SSH daemon to remove privilege separation for root user
or
apply ulimit from the machine not using ssh daemon