Citrix Systems 6 Manual Do Utilizador
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The following alerts appear on the performance graphs in XenCenter. See the XenCenter online help for more
information:
information:
• vm_cloned
• vm_crashed
• vm_rebooted
• vm_resumed
• vm_shutdown
• vm_started
• vm_suspended
• vm_crashed
• vm_rebooted
• vm_resumed
• vm_shutdown
• vm_started
• vm_suspended
Customizing Alerts
Note:
Triggers for alerts are checked at a minimum interval of five minutes (this avoids placing
excessive load on the system to check for these conditions and reporting of false positives);
setting an alert repeat interval smaller than this will result in the alerts still being generated
at the five minute minimum interval.
excessive load on the system to check for these conditions and reporting of false positives);
setting an alert repeat interval smaller than this will result in the alerts still being generated
at the five minute minimum interval.
The performance monitoring
perfmon
runs once every 5 minutes and requests updates from XenServer which
are averages over 1 minute, but these defaults can be changed in
/etc/sysconfig/perfmon
.
Every 5 minutes
perfmon
reads updates of performance variables exported by the XAPI instance running on
the same host. These variables are separated into one group relating to the host itself, and a group for each VM
running on that host. For each VM and also for the host,
running on that host. For each VM and also for the host,
perfmon
reads in the
other-config:perfmon
parameter and uses this string to determine which variables it should monitor, and under which circumstances
to generate a message.
to generate a message.
vm:other-config:perfmon
and
host:other-config:perfmon
values consist of an XML string like
the one below:
<config>
<variable>
<name value="cpu_usage"/>
<alarm_trigger_level value="LEVEL"/>
</variable>
<variable>
<name value="network_usage"/>
<alarm_trigger_level value="LEVEL"/>
</variable>
</config>
Valid VM Elements
name
what to call the variable (no default). If the name value is one of
cpu_usage
,
network_usage
, or
disk_usage
the
rrd_regex
and
alarm_trigger_sense
parameters are not required as defaults
for these values will be used.
alarm_priority
the priority of the messages generated (default
5
)
alarm_trigger_level
level of value that triggers an alarm (no default)
alarm_trigger_sense
high
if
alarm_trigger_level
is a maximum value otherwise
low
if the
alarm_trigger_level
is a minimum value. (default
high
)