I have a redhat9.0 box. The server runs a meta-search engine which connects several engines using aync I/O. The program was intensively debugged.
Sometimes the server presents a strange behaviour. It accepts new incoming
connections (opening sockets .. for instance the web server, ssh, etc),
but it is not able to open any outgoing connections until reboot. If i wait for a long time (30 minutes or so) it starts to work again. The active connections such us ssh are kept.
I kept under control /proc/<pid>/fs and non active proccess is running out of file descriptors (no strange number there).
This happen for different users (noboby, myself, root) and for different processes... when one stops .. all stop
Any idea on what to monitor or to test ?
Any help will be appreciated, this is making me crazy.
My system:
2.4.20-8smp #1 SMP Thu Mar 13 17:45:54 EST 2003 i686 i686 i386 GNU/Linux
model name : Intel(R) Pentium(R) 4 CPU 2.60GHz
cat /proc/meminfo
total: used: free: shared: buffers: cached:
Mem: 1583661056 337104896 1246556160 0 18034688 163811328
cat /proc/sys/fs/file-max
16384
cat /proc/sys/fs/file-nr
2108 82 8192
cat /proc/sys/net/ipv4/ip_local_port_range
32768 61000
# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and
# sysctl.conf(5) for more details.
# Controls IP packet forwarding
net.ipv4.ip_forward = 0
# Controls source route verification
net.ipv4.conf.default.rp_filter = 1
# Controls the System Request debugging functionality of the kernel
kernel.sysrq = 0
# Controls whether core dumps will append the PID to the core filename.
# Useful for debugging multi-threaded applications.
kernel.core_uses_pid = 1
#
# Aggiunto da AG 11/May.04
#
# Set maximum file and inodes
fs.file-max = 16384
fs.inode-max = 65536
