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Showing posts from August, 2011

Linux Kernel Parameter Tuning for Performance Testing

Here are some of the kernel parameters I used on one of the Linux system /etc/sysctl.conf
# 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
# Do not accept source routing net.ipv4.conf.default.accept_source_route = 0
# 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
# Controls the use of TCP syncookies net.ipv4.tcp_syncookies = 1
# Controls the maximum size of a message, in bytes kernel.msgmnb = 65536
# Controls the default maxmimum size of a mesage queue kernel.msgmax = 65536
# Controls the maximum shared segment size, in bytes kernel.shmmax = 68719476736
# Controls the maximum number of shared …