From 99cc28d69058513b17208c13962dead0fa099cc3 Mon Sep 17 00:00:00 2001 From: Petr Lautrbach Date: Fri, 3 Dec 2010 15:49:30 +0100 Subject: sysctl.conf.s390 - system z optimized sysctl settings per default (#633323) --- sysctl.conf.s390 | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/sysctl.conf.s390 b/sysctl.conf.s390 index 0ddc1d55..dc7d085a 100644 --- a/sysctl.conf.s390 +++ b/sysctl.conf.s390 @@ -15,3 +15,16 @@ net.ipv4.conf.default.accept_source_route = 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 + +# Do not spend as much process time too early to write out dirty pages +vm.dirty_ratio = 40 + +# Increase the average time a process runs continuously and also improve the +# cache utilization and server style workload throughput at minor latency cost +kernel.sched_min_granularity_ns = 10000000 +kernel.sched_wakeup_granularity_ns = 15000000 +kernel.sched_tunable_scaling = 0 +kernel.sched_latency_ns = 80000000 -- cgit v1.2.1