常用命令总结
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查看当前Java进程
jps
查看Java线程快照
jstack pid
查看Java内存快照
jmap -histo:live pid
内存快照时间统计
cat file |grep cpu=|grep -Po '(cpu=\d+\.\d+ms)'|grep -Po '(\d+\.\d+)'|awk '{sum += $1}END{print sum}'
关闭JIT
-Djava.compiler=NONE
提交Sonar
mvn sonar:sonar -D "sonar.projectKey=snail" -D "sonar.host.url=http://localhost:9000" -D "sonar.login=token"
消息分类统计
cat snail.log.*|grep -a 处理piece消息|grep TCP|wc -l;cat snail.log.*|grep -a 处理piece消息|grep UTP|wc -l;cat snail.log.*|grep -a 发送piece消息|grep TCP|wc -l;cat snail.log.*|grep -a 发送piece消息|grep UTP|wc -l;
异常分类统计
cat snail.log.* | grep -a Exception | sort | uniq -c | sort
批量查询替换
# sed
sed -i "s/查找内容/替换内容/g" `grep -rl "查找内容" ./`
# vi
# 单行
:s/old/new/g
# 整个文件
:%s/old/new/g
统计日志输出
cat debug.log | grep ' DEBUG ' | awk '{print $5}' | sort | uniq -c | sort
获取进程PID
ps -aux | grep "process name" | grep -v grep | awk '{print $2}'
Linux系统日志
# 查看垃圾文件大小
journalctl --disk-usage
# 保留最近一周日志
journalctl --vacuum-time=1w
# 保留512MB日志
journalctl --vacuum-size=512M
正则表达式提取文本
egrep " (t_\w+) " *.xml -o|sort |uniq -c
grep -E " (t_\w+) " *.xml -o|sort |uniq -c
TAR压缩指定时间文件
tar czvf backtup.tar.gz --newer "2012-12-12 00:00:00" backup/
jstack
按照cpu排序
cat jstack.log | grep cpu | awk -F "\"" '{cpu=$3; name=$2; match(cpu, /cpu=(.*)ms.*/, arr); print arr[1] " " name}'|sort -nk 1