The last article on how to use LoadRunner monitor Linux performance indicators, but the CPU on a few indicators are not clear, the following detailed said.
CPU Utilization good understanding, that is, CPU utilization, more than 75% is higher (also has the argument is 80% or higher). In addition to this indicator, but also in combination with the load
CPU utilization good understanding, that is, CPU utilization, more than 75% is higher (also has the argument is 80% or higher). In addition to this indicator, but also in combination with the load average and context Switch rate, it is possible that the high CPU is due to the latter two high indicators.
Load
In peacetime operations, when a server has a performance problem, it usually looks at the current CPU usage, especially the load of the CPU (load average).To get the CPU load of the server, there are three kinds of commands:1) w command [[email protected] ~]# W 12:12:41 up 167 days, 20:46, 2 users, load
Shell monitor Cpu,memory,load average, log to log, when load pressure, email notify admin.
Principle:
1. Get the value of the Cpu,memory,load average
2. Determine whether the value exceeds the scope of the customization, for example (Cpu>90%,memory
3. The value exceeds t
In Linux, the cpu usage load average is a simple understanding. Generally, the load average can be observed through top or uptime. The format is as follows: load average: 0.10, 0.05, 0.58 represents the last minute, respectively, 5 minutes, 15 minutes average
The shell monitors cpu,memory,load average, logs to log, and notifies the administrator when the load is under pressure.Implementation principle:1. Get the value of Cpu,memory,load average2. Determine if the value exceeds the custom range, for example (Cpu>90%,memory3. If the value exceeds the range, send an email to n
Top found the load average is very high, the website almost can't openSuch as:
This is how I do, I do not understand the server, mainly to do PHP development
Reply content:
Top found the load average is very high, the website almost can't openSuch as:
This is how I do, I do not understand the server, mainly to do PHP development
No one answers, I'm all tangled up.
Should be hard disk IO problem, is
Load AverageRefers to the number of tasks in the run queue, if only 1 processes in the running queue for 1 minutes, the 1-minute load average is 1, only 1 processes in the running queue half a minute, the 1-minute load average is 0.5, meaning that in the last 1 minutes, the running queue has 50 % of the time is no task.The state of the process in the running queue is R, and in Linux, processes other than th
This command can be used in two major scenarios: Check whether your machine has been restarted recently, or whether it has been restarted due to hardware or other reasons, and check whether your CPU load is working properly?Uptime10:19:04 up 257 days, 12 users, load average: 2.10, 2.10, 2.09
1. 10:19:04 // current system time2. Up 257 days, // the host has run time. The larger the time, the more stable your
Shell monitors cpu, memory, and load average, records the log, and sends an email to the Administrator when the load is under pressure.
Principle:
1. Obtain the value of cpu, memory, and load average.
2. Determine whether the value exceeds the custom range, for example (CPU>
This command has two major uses, one is to see if your machine has recently been restarted, or because of hardware, and so on, the other is to look at your CPU load.
Uptime
10:19:04 up 257 days, 18:56, users, load average:2.10, 2.10,2.09
1.10:19:04//System Current time2, up 257 days, 18:56//host has been running time, the greater the time, indicating that your machine more stable.3/user connection number, i
- Qs. statement_start_offset) / 2 ) + 1 ) As Statement_text From SYS. dm_exec_query_statsAs Qs Cross Apply SYS. dm_exec_ SQL _text (Qs. SQL _handle) As St) As Query_stats Group By Query_stats.query_hash Order By 2 Desc ; Go /* Another method is to calculate the average CPU value-from msdn SYS. dm_exec_ SQL _text */ Select Top 5 Total_worker_time / Execution_count A
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