Server Load with CPU Usage

Mahfuz_SS_EHL

Hi,
I'm running a VM with access to 4 Cores of E5-2620 v2 (2.1 GHz x 4). Recently, having problem with High Load. But, I can't understand how the CPU being 90%+ Idle, Load goes to 3.5+ ??

Can anyone explain me the internal factors ??

Virtovo

Nginx looks to be in sleep. Most likely cause is blocking on disk IO. Any disk issues?

0xdragon

Zen said: I/O values in general

Err. I'm pretty sure it's CPU "traffic". Correct me if I'm wrong!

Mahfuz_SS_EHL

@Virtovo said:
Nginx looks to be in sleep. Most likely cause is blocking on disk IO. Any disk issues?
@Zen said:
Load is a calculated average based on I/O values in general.

I recommend you run iotop rather than top.

I ran iotop & monitored for 5 Minutes. Total Disk Read Never Crossed 10 mbps in that time-frame & Total Disk Write never Crossed 4 mbps in that duration. Is that Normal or I'm using much ??

Silvenga

0xdragon said: Err. I'm pretty sure it's CPU "traffic". Correct me if I'm wrong!

CPU load is essentially a running queue of CPU "tasks". The longer the list, the higher the CPU load. He meant that IO can prevent tasks from being processed on the CPU - thus queuing up.

The code used is pretty simple:

 count -= ticks;
   if (count < 0) {
      count += LOAD_FREQ;
      active_tasks = count_active_tasks();
      CALC_LOAD(avenrun[0], EXP_1, active_tasks);
      CALC_LOAD(avenrun[1], EXP_5, active_tasks);
      CALC_LOAD(avenrun[2], EXP_15, active_tasks);
   }

ehostlab said: I ran iotop & monitored for 5 Minutes. Total Disk Read Never Crossed 10 mbps in that time-frame & Total Disk Write never Crossed 4 mbps in that duration. Is that Normal or I'm using much ??

So you do have some bottleneck somewhere. I doubt the IO, else you're running on a flash drive.

Mahfuz_SS_EHL

@Silvenga said:
So you do have some bottleneck somewhere. I doubt the IO, else you're running on a flash drive.

I've monitored it when the Server Load was remaining between 0.50-0.90. I've to keep My Eyes open when it goes above 4.