[Xen-users] Performance in Xens

[<karhong.ng@xxxxxxx>]

Hi,

I have 3 domU running on a single server.
Domain "clas-0" is exporting a directory to domain "dbn-0" via NFS.
Both "clas-0" and "dbn-0" has time synchronisation from another external server.
Both "clas-0" and "dbn-0" each has HDD file size of 50G.
I can ssh into both "clas-0' and "dbn-0" normally ; login response is acceptable.
Each domU has only a single virtual bridge.
There is only one physical interface in the host machine, ie each domU virtual interface is bridged into a single interface.

"/var/log/xen/xend.log" file does not indicate any errors.

At time of writing right now, "dbn-0" is creating an Oracle database instance of 30G.

My problem is that the domain "dbn-0"  is creating the oracle instance very slowly.
I do not know where the problem lies.
Therefore I appreciate your advice on this, or any directions to identify the bottlenecks.

Thanks.
==============================================================================================================================

xentop - 01:18:51   Xen 3.0.3-rc5-8.1.4.el
4 domains: 1 running, 3 blocked, 0 paused, 0 crashed, 0 dying, 0 shutdown
Mem: 8386520k total, 8385632k used, 888k free    CPUs: 8 @ 2000MHz
      NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) MAXMEM(%) VCPUS NETS NETTX(k) NETRX(k) VBDS   VBD_OO   VBD_RD   VBD_WR SSID

     clas0 --b---       5633    3.0    1063196   12.7    1071516      12.8     1    1        0        0    2        0        0        0    0

VCPUs(sec):   0:       5633s
Net0 RX:        0bytes        0pkts        0err        0drop  TX:        0bytes        0pkts        0err        0drop
VBD 5632 [16: 0]  OO:        0   RD:        0   WR:        0
VBD  768 [ 3: 0]  OO:        0   RD:        0   WR:        0
     clas1 --b---       9801    3.1    1063324   12.7    1071516      12.8     1    1        0        0    1        0        0        0    0

VCPUs(sec):   0:       9801s
Net0 RX:        0bytes        0pkts        0err        0drop  TX:        0bytes        0pkts        0err        0drop
VBD  768 [ 3: 0]  OO:        0   RD:        0   WR:        0
      dbn0 --b---       8130    3.1    1063196   12.7    1071516      12.8     1    1        0        0    1        0        0        0    0

VCPUs(sec):   0:       8130s
Net0 RX:        0bytes        0pkts        0err        0drop  TX:        0bytes        0pkts        0err        0drop
VBD  768 [ 3: 0]  OO:        0   RD:        0   WR:        0
  Domain-0 -----r       9525    0.9    5101568   60.8   no limit       n/a     8    4  1058702   766852    0        0        0        0    0

VCPUs(sec):   0:       6011s  1:        288s  2:       1002s  3:        658s  4:        213s
          5:        203s  6:        807s  7:        339s
Net0 RX: 785256533bytes  1867080pkts        0err        0drop  TX: 1084111128bytes   521828pkts        0err        0drop

Net1 RX:        0bytes        0pkts        0err        0drop  TX:        0bytes        0pkts        0err        0drop
Net2 RX:        0bytes        0pkts        0err        0drop  TX:        0bytes        0pkts        0err        0drop
Net3 RX:        0bytes        0pkts        0err        0drop  TX:        0bytes        0pkts        0err        0drop
==============================================================================================================================

==============================================================================================================================

[root@hostmachine ~]# xm vcpu-list
Name                              ID VCPUs   CPU State   Time(s) CPU Affinity
Domain-0                           0     0     0   -b-    6013.0 any cpu
Domain-0                           0     1     3   -b-     288.6 any cpu
Domain-0                           0     2     7   -b-    1002.7 any cpu
Domain-0                           0     3     3   -b-     658.6 any cpu
Domain-0                           0     4     4   -b-     213.9 any cpu
Domain-0                           0     5     2   -b-     203.7 any cpu
Domain-0                           0     6     1   -b-     808.0 any cpu
Domain-0                           0     7     6   r--     339.5 any cpu
clas0                             13     0     4   -b-    5640.1 any cpu
clas1                              7     0     4   -b-    9807.0 any cpu
dbn0                              10     0     5   -b-    8134.7 any cpu
==============================================================================================================================

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