# 删除偶数行
:%normal jdd
# 删除奇数行
:%normal jkdd
[......]
vim删除奇数行/偶数行
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Linux / Nginx 高并发场景性能调优
Server端
- nofile
- iptables 关掉
- Nginx http1.1 keep alive 1000 least_conn
Client端
- ip_local_port_range
[......]
Java堆外内存排查
1 查看内存占用
# pid
pmap -x pid | sort -n -k3
# memory
---------------- ------- ------- -------
00000007c1324000 1028976 0 0 ----- [ anon ]
00007f09d9a0a000 12 0 0 ----- [ anon ]
00007f09da212000 12 0[......]
乱码速查表
[......]
防止Chrome被关闭的插件
Chrome Close Lock
https://chrome.google.com/webstore/detail/chrome-close-lock/plcabbfeeokakkmdecdccmibahigjkno[......]