Linux简单调优与JVM参数.docx
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2019-12-30
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Linux 服务器调优
修改 ulimit
修改系统限制配置/etc/security/limits.conf：
* soft nproc 65535
* hard nproc 66535
* soft nole 65535
* hard nole 65535
还需要修改： /etc/security/limits.d/90-nproc.conf
* soft proc 65535
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TCP 优化
修改/etc/sysctl.conf, 修改完后 sysctl -p 生效
net.core.rmem_default = 256960
net.core.rmem_max = 513920
net.core.wmem_default = 256960
net.core.wmem_max = 513920
net.core.netdev_max_backlog = 3000
net.core.somaxconn = 2048
net.core.optmem_max = 81920
net.ipv4.tcp_mem = 131072 262144 524288
net.ipv4.tcp_rmem = 8760 256960 4088000
net.ipv4.tcp_wmem = 8760 256960 4088000
net.ipv4.tcp_keepalive_time = 1200
net.ipv4.tcp_keepalive_intvl = 30
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_sack = 1
net.ipv4.tcp_fack = 1
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
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