[Qemu-discuss] VM get 'insufficient system resources exist to complete the requested service' error.

[John Y.]

I created a kvm virtual machine with windows 7 using qemu2.5.
I controlled the vm by spice and do some normal things in the vm, such as
file editing, visit websites.
I felled my vm run slowly after few days and I got 'insufficient system
resources exist to complete the requested service' when I tried to open
Task Manager or login the system.

1. How can I solve this problem?
2. How can I improve the performance of vm with window7 (Have some
confuguration of qemu, guest or host system need to pay attention to)?


Here are the information:

qemu version:
QEMU emulator version 2.5.1.1, Copyright (c) 2003-2008 Fabrice Bellard

uname -a
Linux server01 4.2.0-1.el7.elrepo.x86_64 #1 SMP Sun Aug 30 21:25:29 EDT
2015 x86_64 x86_64 x86_64 GNU/Linux

libvirt.xml:
<domain xmlns:qemu="http://libvirt.org/schemas/domain/qemu/1.0"; type="kvm">

  <name>win7_001</name>
  <os>
    <type arch="x86_64" machine="pc-i440fx-1.7">hvm</type>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset="localtime"/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <vcpu current="2">2</vcpu>
  <cpu>
    <topology sockets="1" cores="2" threads="1"/>
  </cpu>
  <memory>4194304</memory>
  <currentMemory>4194304</currentMemory>
  <devices>
    <emulator>/root/qemu25/x86_64-softmmu/qemu-system-x86_64</emulator>
    <disk device="disk" type="file">
      <driver name="qemu" type="qcow2" cache="none"/>
      <source file="/root/vm/wind7_01/win7.qcow2/>
      <target bus="virtio" dev="vda"/>
    </disk>
    <disk type="file" device="cdrom">
      <source dev=""/>
      <target dev="hdc" bus="ide"/>
    </disk>
    <serial type="pty">
      <source path="/dev/pts/1"/>
      <target port="0"/>
    </serial>
    <input type="tablet" bus="usb"/>
    <input type="mouse" bus="ps2"/>
    <controller type="usb" index="0" model="ich9-ehci1">
      <alias name="usb0"/>
    </controller>
    <controller type="usb" index="0" model="ich9-uhci1">
      <alias name="usb0"/>
      <master startport="0"/>
    </controller>
    <controller type="usb" index="0" model="ich9-uhci2">
      <alias name="usb0"/>
      <master startport="2"/>
    </controller>
    <controller type="usb" index="0" model="ich9-uhci3">
      <alias name="usb0"/>
      <master startport="4"/>
    </controller>
    <redirdev bus="usb" type="spicevmc">
      <alias name="redir0"/>
    </redirdev>
    <redirdev bus="usb" type="spicevmc">
      <alias name="redir1"/>
    </redirdev>
    <redirdev bus="usb" type="spicevmc">
      <alias name="redir2"/>
    </redirdev>
    <redirdev bus="usb" type="spicevmc">
      <alias name="redir3"/>
    </redirdev>
    <graphics type="spice" autoport="yes" listen='0.0.0.0' keymap='en-us'/>
    <sound model="ac97"/>
    <video>
      <model type="qxl" ram="65536" vram="65536" heads="1"/>
    </video>
    <channel type="unix">
      <source mode="bind"/>
      <target type="virtio" name="org.qemu.guest_agent.0"/>
    </channel>
    <interface type="bridge">
      <mac address="fa:16:3e:6f:55:5b"/>
      <source bridge="virtio"/>
      <model type="virtio"/>
    </interface>
  </devices>
  <qemu:commandline>
    <qemu:arg value="-cpu"/>
    <qemu:arg value="host"/>
  </qemu:commandline>
</domain>


Regards
John.