mirror of https://github.com/fengyuhetao/shell.git
21 lines
830 B
Bash
21 lines
830 B
Bash
#!/usr/bin/env bash
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# 来源: https://blog.csdn.net/qianghaohao/article/details/80379118
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# 服务器线程数达到 2500 以上时 dump 线程数最多的 java 进程的线程及内存
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#
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source ~/.bashrc
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cur_thread_num=`ps -efL | wc -l`
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if [ $cur_thread_num -le 2500 ]; then
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exit 0
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fi
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cur_date=`date +"%Y-%m-%d_%H-%M-%S"`
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cd ./dumpfile
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# 服务器当前线程 dump 到文件:按照线程数由大到小排序显示
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ps -efL --sort -nlwp > server_thread_dump_$cur_date
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# dump 线程数最多的 jvm 的线程及内存
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most_thread_num_pid=`cat server_thread_dump_$cur_date | sed -n '2p' | awk '{print $2}'`
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nohup jstack -l $most_thread_num_pid > java_app_thread_dump_${cur_date}_pid_${most_thread_num_pid} &
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nohup jmap -dump:format=b,file=java_app_mem_dump_${cur_date}_pid_${most_thread_num_pid} $most_thread_num_pid &
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exit 0
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