I don't know which distro and version you are using, but watch out for
surprises in what vm.swappiness=0 means. In older kernels it means "only use
swap when desperate". I believe that newer kernels changed to have 1 mean
that, and 0 means to always use the oomkiller. Neither situation is strictly
good or bad, what matters is what you intend the system behavior to be in
comparison with whatever monitoring/alerting you have put in place.
R
On 10/18/19, 9:04 PM, "Sergio Bilello" <lapostadiser...@gmail.com> wrote:
Message from External Sender
Hello everyone!
Do you have any setting that you would change or tweak from the below list?
sudo cat /proc/4379/limits
Limit Soft Limit Hard Limit Units
Max cpu time unlimited unlimited seconds
Max file size unlimited unlimited bytes
Max data size unlimited unlimited bytes
Max stack size unlimited unlimited bytes
Max core file size unlimited unlimited bytes
Max resident set unlimited unlimited bytes
Max processes 32768 32768
processes
Max open files 1048576 1048576 files
Max locked memory unlimited unlimited bytes
Max address space unlimited unlimited bytes
Max file locks unlimited unlimited locks
Max pending signals unlimited unlimited signals
Max msgqueue size unlimited unlimited bytes
Max nice priority 0 0
Max realtime priority 0 0
Max realtime timeout unlimited unlimited us
These are the sysctl settings
default['cassandra']['sysctl'] = {
'net.ipv4.tcp_keepalive_time' => 60,
'net.ipv4.tcp_keepalive_probes' => 3,
'net.ipv4.tcp_keepalive_intvl' => 10,
'net.core.rmem_max' => 16777216,
'net.core.wmem_max' => 16777216,
'net.core.rmem_default' => 16777216,
'net.core.wmem_default' => 16777216,
'net.core.optmem_max' => 40960,
'net.ipv4.tcp_rmem' => '4096 87380 16777216',
'net.ipv4.tcp_wmem' => '4096 65536 16777216',
'net.ipv4.ip_local_port_range' => '10000 65535',
'net.ipv4.tcp_window_scaling' => 1,
'net.core.netdev_max_backlog' => 2500,
'net.core.somaxconn' => 65000,
'vm.max_map_count' => 1048575,
'vm.swappiness' => 0
}
Am I missing something else?
Do you have any experience to configure CENTOS 7
for
JAVA HUGE PAGES
https://urldefense.proofpoint.com/v2/url?u=https-3A__docs.datastax.com_en_dse_5.1_dse-2Dadmin_datastax-5Fenterprise_config_configRecommendedSettings.html-23CheckJavaHugepagessettings&d=DwIBaQ&c=9Hv6XPedRSA-5PSECC38X80c1h60_XWA4z1k_R1pROA&r=OIgB3poYhzp3_A7WgD7iBCnsJaYmspOa2okNpf6uqWc&m=zke-WpkD1c6Qt1cz8mJG0ZQ37h8kezqknMSnerQhXuU&s=b6lGdbtv1SN9opBsIOFRT6IX6BroMW-8Tudk9qEh3bI&e=
OPTIMIZE SSD
https://urldefense.proofpoint.com/v2/url?u=https-3A__docs.datastax.com_en_dse_5.1_dse-2Dadmin_datastax-5Fenterprise_config_configRecommendedSettings.html-23OptimizeSSDs&d=DwIBaQ&c=9Hv6XPedRSA-5PSECC38X80c1h60_XWA4z1k_R1pROA&r=OIgB3poYhzp3_A7WgD7iBCnsJaYmspOa2okNpf6uqWc&m=zke-WpkD1c6Qt1cz8mJG0ZQ37h8kezqknMSnerQhXuU&s=c0S3S3V_0YHVMx2I-pyOh24MiQs1D-L73JytaSw648M&e=
https://urldefense.proofpoint.com/v2/url?u=https-3A__docs.datastax.com_en_dse_5.1_dse-2Dadmin_datastax-5Fenterprise_config_configRecommendedSettings.html&d=DwIBaQ&c=9Hv6XPedRSA-5PSECC38X80c1h60_XWA4z1k_R1pROA&r=OIgB3poYhzp3_A7WgD7iBCnsJaYmspOa2okNpf6uqWc&m=zke-WpkD1c6Qt1cz8mJG0ZQ37h8kezqknMSnerQhXuU&s=PZFG6SXF6dL5LRJ-aUoidHnnLGpKPbpxdKstM8M9JMk&e=
We are using AWS i3.xlarge instances
Thanks,
Sergio
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