Dear Amos
returning to our problem CPU Spikes on squid 3.1.19 or 2.7.9 i see this
bug in gdb
while ((t_off + p.len) < offset)
and other while loops like ( while L ) and hanging
and some errors like : 0x00007f4e932c8103 in epoll_wait () from
/lib64/libc.so.6
this errors rises CPU to 100% for random time and comes down back to
the normal value
i dont think there is a hardware issue because the problem occurs in
any time even when squid is not loaded
as a notice i have 4 servers one of them is having such problem . the
only difference that the server with the issue has new kernel
Linux proxy4 3.10.25-gentoo SMP
gcc version 4.5.4 (Gentoo 4.5.4 p1.2, pie-0.4.7)
while the other servers have
Linux proxy91 3.4.9-gentoo
gcc version 4.5.4 (Gentoo 4.5.4 p1.0, pie-0.4.7)
i had compile errors on proxy 4 for squid 3.1 so i added this to
configure
CC=x86_64-pc-linux-gnu-gcc CFLAGS=-O2 -pipe -m64 -mtune=generic
LDFLAGS=-Wl,-O1 -Wl,--as-needed CXXFLAGS= --cache-file=/dev/null
--srcdir=.
does these cause these C loops
Thanks Amos
On 02/07/2014 03:29 PM, Ayham Abou Afach wrote:
On 02/03/2014 10:37 PM, Amos Jeffries wrote:
On 2014-02-04 00:00, Ayham Abou Afach wrote:
Dear All
i have problem with squid
CPU spikes for 100% some times for random times from seconds to
minutes . in this time traffic goes down and squid seems to be
hanging
and after this every thing become normal and the process continue
working without shutdown and even any change in PID ..
i tried squid 3.1 , 2.7 with the same problem i have solid state
disks
for small objects , and the same config is used on three other
servers
could be a hardware issue ( i don't see any error in syslog )
Best regards
Ayham
Are you sure it is Squid and not something else in the system?
there is nothing on system but squid and named and what is clear in
top command that squid is taking 100% CPU some times
and when try to strace to this process while it's hanging the strace
hangs without going into process
(eg. memory swapping, kernel loading/unloading something big from
RAM, SSD controllers recovering broken sectors with blocking I/O
operations, schtuff like that...)
vmstat shows wa ( CPU wait ) less than 2 ( using ssd disks )
how can i monitor the other things like disk controllers or other
things
Does it still occur with the latest stable Squid? (3.4.3 today).
i didn't try squid 3.4 yet
Amos
