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[Qemu-discuss] VM get 'insufficient system resources exist to complete t

From: John Y.
Subject: [Qemu-discuss] VM get 'insufficient system resources exist to complete the requested service' error.
Date: Tue, 21 Feb 2017 09:29:22 +0800

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, 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

<domain xmlns:qemu="http://libvirt.org/schemas/domain/qemu/1.0" type="kvm">  
    <type arch="x86_64" machine="pc-i440fx-1.7">hvm</type> 
  <clock offset="localtime"/>  
  <vcpu current="2">2</vcpu>  
    <topology sockets="1" cores="2" threads="1"/> 
    <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 type="file" device="cdrom"> 
      <source dev=""/>  
      <target dev="hdc" bus="ide"/> 
    <serial type="pty"> 
      <source path="/dev/pts/1"/>  
      <target port="0"/> 
    <input type="tablet" bus="usb"/>  
    <input type="mouse" bus="ps2"/>  
    <controller type="usb" index="0" model="ich9-ehci1"> 
      <alias name="usb0"/> 
    <controller type="usb" index="0" model="ich9-uhci1"> 
      <alias name="usb0"/>  
      <master startport="0"/> 
    <controller type="usb" index="0" model="ich9-uhci2"> 
      <alias name="usb0"/>  
      <master startport="2"/> 
    <controller type="usb" index="0" model="ich9-uhci3"> 
      <alias name="usb0"/>  
      <master startport="4"/> 
    <redirdev bus="usb" type="spicevmc"> 
      <alias name="redir0"/> 
    <redirdev bus="usb" type="spicevmc"> 
      <alias name="redir1"/> 
    <redirdev bus="usb" type="spicevmc"> 
      <alias name="redir2"/> 
    <redirdev bus="usb" type="spicevmc"> 
      <alias name="redir3"/> 
    <graphics type="spice" autoport="yes" listen='' keymap='en-us'/>
    <sound model="ac97"/>  
      <model type="qxl" ram="65536" vram="65536" heads="1"/> 
    <channel type="unix"> 
      <source mode="bind"/>  
      <target type="virtio" name="org.qemu.guest_agent.0"/> 
    <interface type="bridge">
      <mac address="fa:16:3e:6f:55:5b"/>
      <source bridge="virtio"/>
      <model type="virtio"/>
    <qemu:arg value="-cpu"/>  
    <qemu:arg value="host"/> 


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