linux 资源消耗分析

linux下查看最消耗CPU、内存的进程                                                                                                                                                                                                                                 
                                                                                                                                                                                                                                                                 
1.CPU占用最多的前10个进程：                                                                                                                                                                                                                                      
ps auxw|head -1;ps auxw|sort -rn -k3|head -10                                                                                                                                                                                                                    
2.内存消耗最多的前10个进程                                                                                                                                                                                                                                       
ps auxw|head -1;ps auxw|sort -rn -k4|head -10                                                                                                                                                                                                                    
3.虚拟内存使用最多的前10个进程                                                                                                                                                                                                                                   
ps auxw|head -1;ps auxw|sort -rn -k5|head -10 

 

vmstat 1 10 查看内存开销

iostat -x 1 10 查看io开销

 

free详解

 

注意，有些结果可能计算有重复，比如统计内存，服务进程带来的开销，有可能是重复计算的，因为使用了共享内存。