Linux其他技巧
2016年05月26日

防止linux出现大量 FIN_WAIT1,提高性能(可能有误)

# 当连接数多时,经常出现大量FIN_WAIT1,可以修改 /etc/sysctl.conf
# 修改
net.ipv4.tcp_fin_timeout = 10
net.ipv4.tcp_keepalive_time = 30
net.ipv4.tcp_window_scaling = 0
net.ipv4.tcp_sack = 0
# 然后:
/sbin/sysctl -p
#使之生效
# 查看是否生效
cat /proc/sys/net/ipv4/tcp_fin_timeout 
netstat -nat | grep FIN_WAIT1

# 另外一篇介绍
# 大部分是说net.ipv4.tcp_fin_timeout = 10来调节,不管用,狂在百度里谷歌:
net.ipv4.tcp_keepalive_probes = 5
net.ipv4.tcp_keepalive_intvl = 15
net.ipv4.tcp_retries2 = 5
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_reordering = 5
net.ipv4.tcp_retrans_collapse = 0
# 一下子搞定,目前还不知道各个参数含义,待查!
# 全部的sysctl.conf如下:
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.tcp_max_tw_buckets = 50000
net.ipv4.tcp_fin_timeout = 10
net.ipv4.tcp_keepalive_time = 30
net.ipv4.tcp_window_scaling = 0
net.ipv4.tcp_sack = 0
fs.file-max = 65536
net.ipv4.tcp_max_syn_backlog = 65536
net.core.netdev_max_backlog = 32768
net.core.somaxconn = 32768
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2
net.ipv4.tcp_max_syn_backlog = 10240
net.core.netdev_max_backlog = 51200
net.ipv4.tcp_keepalive_probes = 5
net.ipv4.tcp_keepalive_intvl = 15
net.ipv4.tcp_retries2 = 5
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_reordering = 5
net.ipv4.tcp_retrans_collapse = 0

firefox支付宝控件

看看是不是内部链接的库没有找到,安装对应的库就可以了(注意版本).

ldd `/.mozilla/plugins/aliedit.so | grep "not found"