Latency even when high ping ping localhost

Hello

Since a few days, maybe a week we are faced with a strange ping latency.

At first, we thought it has something to do with our network equipment, but after a few hours of investigation, we arrive at the following conclusions:

(1) Pinging VM VM (both hosted on the same host ESXi) lead to an average 1.5 ms > with spikes up to 50ms / 100 pings to the default interval.

(2) created two virtual machines on a vSwitch separated without a dedicated NIC and tried a ping between them. The result was better but not good enough - average 0.5ms > with spikes up to 3ms and same 10ms

Management interfaces Pinging ESXi 3) other devices on the same LAN has revealed a good ping - average latency around 0.2ms with spikes up to 1.7ms

(4) peripheral Pinging on the ESXi console itself (from SSH) network showed us a higher latency than expected - medium > 0.6ms with spikes up to 5ms

(5) the interesting part: ping localhost ESXi console - average > 0.3ms with spikes up to 2-3 ms

We thought it might be an argument/bottleneck somewhere on the ESXi but could not conclude that, not yet at least. The CPU usage is about 65-80% with spikes up to 85% in esxtop. This may be the cause of our problem? Here's an esxtop output:


PCPU USED (%): 59 61 52 63 74 59 68 74 AVG: 64

PCPU UTIL (%): 60 61 53 63 75 60 69 74 AVG: 64

ID NAME NWLD % USED GID % PERFORMANCE SYS % WAITING % VMWAIT % % IDLE % OVRLP % % MLMTD % SWPWT CSTP RDY

1 8 275.55 slowed 1 546.00 0.01 0.00 - 224,18 7.03 0.00 0.00 0.00 0.00

8 8 86 helper 97,66 99,76 0.00 0.00 8101.96 - 51, 99 2,24 0.00 0.00 0.00

1786346 1786346 FreeBSD9_037 10 71,96 71,78 2.37 771.33 1.69 58,69 196.71 2.49 53,55 0.00 0.00

6218425 6218425 FreeBSD9_152 8 69,71 70,18 2.55 657,31 0.43 35.38 85.34 3.17 0.36 0.00 0.00

4825332 4825332 webhosting01.wh 12 41.80 39,86 3.44 1070,75 0.43 36,05 305.25 2.12 1.45 0.00 0.00

6363251 6363251 esxtop.36586035 1 20.00 19.33 75.09 0.00 - 0.11 0.00 0.04 0.00 0.00 0.00

5587218 5587218 CentOS5_148 10 17.43 15,48 1.89 907.99 1.08 32,95 333.24 0.62 0.00 0.00 0.00

1528430 1528430 FreeBSD9_116 8 17.00 16,97 0.81 707,03 0.13 39.60 134.28 0.19 0.95 0.00 0.00

4108400 4108400 FreeBSD9_140 8 13.54 13.67 0.38 725,60 4.52 22,63 146.88 4.08 0.57 0.00 0.00

1884461 1884461 FreeBSD9_134 8 12.79 12.49 0.67 738,98 0.18 13.53 165,37 0,53 0.00 0.00 0.00

6112231 6112231 FreeBSD9_143 7 12.24 11.99 0.96 0.00 647,13 7.75 75,78 0.79 0.00 0.00 0.00

4409984 4409984 Win7_128 8 9.06 9,20 0.04 0.02 742,67 3.87 176.57 0.25 0.00 0.00 0.00

6285951 6285951 Unattended_Depl 9 8.73 8,01 0.84 835,92 0.04 6.54 174.64 0.48 0.00 0.00 0.00

support process uses much CPU but I have no ideea how to debug this process more away or could be the cause of this.

There is no bottleneck in strangulation/contention on the side network.

Our installation is quite simple:

An ESXi 5.1.0 build 1065491 running on an old HP DL585 G2 with 8 x Opteron 8218 processors and 64 GB of RAM. The host's link to the rest of the infrastructure through two switches: a gigabit switch for production and accessible from the outside (public IP addresses) and a gigabit to 100 Mbps for internal management using IP addresses private. One NIC is connected to each of these two switches and we use vDS. Two management/VMKernel interfaces - one on the public interface and the internal interface. Virtual machines of the customer are in the same network/LAN with the public management interface, no VLAN.

We use for storage SAN - EMC Clariion CX3-20 - connected to the ESXi Server interrrupteurs 2xBrocade clocked at 4 Gbps.

If someone had similar problems or if you have any ideea what could cause these latencies I would appreciate a little help :)

Kind regards

Raul

As mentioned by Jon before your CPU RDY and CSTP % are far too high. I suspect that this could be one of (if not) the main cause. From what I can tell of your dough esxtop, you seem to be run (at least) about 24 vCPUs in an old server with 8 physical CPU cores. As a general rule, you should aim % RDY below 5 per vCPU.

If you can update the hardware or throw in another server to balance the load, then you should reduce the number of vCPUs on your VM. Check this than your VMS really need and adjust the number of vCPUs accordingly.

Of course an update at least a recent release 5.1 does not hurt, but I doubt it will get rid of the high values of time loan CPU if you keep an oversupply vCPUs on this host.

Tags: VMware

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    My computer is not a brand. It was customized and installed. He bought two or three years ago. The use of the 350 GB hard drive is used by 50%. The computer in the past goes to sleep when there is no movement of the mosue for 15 minutes, or when not in use. He wakes up again when there mouse moves to restart the CPU and turn on the monitor screen.

    Now, he had problem with this kind of stop suddenly attack never wake up its "sleep" again during the month five, which I believe it was several viruses in the files of e-mail in the past months, and when it is very likely that I downloaded from CNET some cleaners or anti-spyware.  I don't know what problem is.

    I then withdrew them a month later of the program/Control Panel / uninstalled program. On the advice of my friend, I then changed version free download AVG.

    16. the information contained in the computer, start/program/computer/properties, gives the following information:

    It's Intel Core Due E7500 @ 2.93 Ghz, 4 GB of Ram, 32-bit operating system, windows 7 Home Premium, 2009.

    It is a Microsoft Firewall protection and is installed with fre download AVG anti-virus protection. He is shown to start/program/system and security / firewall /- and he said: 'Stat window firewall' is 'on '.

    17, finally, with the light of the foregoing, I would sincerely ask the Microsoft community to help solve this problem of closure. I would like to thank all the people in the community who can help me in advance here.

    18. I hope to hear your solutions with you. Thank you.

    Run "cleaners" or optimizers may have caused a number of problems.

    And since you have them installed some time ago a system restore won't help.

    Run the System File Checker

    http://www.SevenForums.com/tutorials/1538-SFC-SCANNOW-Command-System-File-Checker.html

    Run a scan for malware http://www.malwarebytes.org/products/malwarebytes_free/

    Maybe to repair your installation of win

    Ensure that the chipset drivers have been updated by the author of the motherboard

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