https://codeleading.com/article/62714982205/
存活的连接
jmap -histo:live 96984 | grep com.mysql.jdbc.JDBC4Connection
总共的连接对象
jmap -histo 96984 | grep com.mysql.jdbc.JDBC4Connection标签：jdbc,java,com,连接数,mysql,jmap From： https://www.cnblogs.com/kaibindirver/p/17100305.html