import XenAPI session = XenAPI.Session("https://xenserver") session.login_with_password("user", "pass")

: Overcommitted host vCPUs > physical cores.

# Host CPU utilization (average over 5 sec) xe host-data-source-list host=<host_uuid> name_label="cpu_usage" xe host-data-source-query host=<host_uuid> data-source="cpu_usage" xe vm-data-source-list vm=<vm_name> name_label="cpu_usage" xe vm-data-source-query vm=<vm_name> data-source="cpu_usage" VM disk latency xe vm-data-source-query vm=<vm_name> data-source="vbd_xvda_latency" Memory ballooning xe vm-data-source-query vm=<vm_name> data-source="memory_actual" 3.3 RRD Updates XenServer stores performance data in Round-Robin Databases (RRD) under /var/lib/xcp/rrd/ . You can extract them using:

rrdtool dump /var/lib/xcp/rrd/<host-uuid>.rrd 4.1 Monitoring Dom0 Health Dom0 (Control Domain) manages I/O and toolstack. Overloaded Dom0 impacts all VMs.

# Check Dom0 memory xe vm-list params=memory-actual,name-label=Control\ domain\ on\ host xe vm-console vm="Control domain on host" then run 'top' or 'xentop'

xentop -d 2 -b For iSCSI, NFS, or Fibre Channel SRs:

Citrix Xenserver Performance: Monitoring

import XenAPI session = XenAPI.Session("https://xenserver") session.login_with_password("user", "pass")

: Overcommitted host vCPUs > physical cores. citrix xenserver performance monitoring

# Host CPU utilization (average over 5 sec) xe host-data-source-list host=<host_uuid> name_label="cpu_usage" xe host-data-source-query host=<host_uuid> data-source="cpu_usage" xe vm-data-source-list vm=<vm_name> name_label="cpu_usage" xe vm-data-source-query vm=<vm_name> data-source="cpu_usage" VM disk latency xe vm-data-source-query vm=<vm_name> data-source="vbd_xvda_latency" Memory ballooning xe vm-data-source-query vm=<vm_name> data-source="memory_actual" 3.3 RRD Updates XenServer stores performance data in Round-Robin Databases (RRD) under /var/lib/xcp/rrd/ . You can extract them using: import XenAPI session = XenAPI

rrdtool dump /var/lib/xcp/rrd/<host-uuid>.rrd 4.1 Monitoring Dom0 Health Dom0 (Control Domain) manages I/O and toolstack. Overloaded Dom0 impacts all VMs. Overloaded Dom0 impacts all VMs

# Check Dom0 memory xe vm-list params=memory-actual,name-label=Control\ domain\ on\ host xe vm-console vm="Control domain on host" then run 'top' or 'xentop'

xentop -d 2 -b For iSCSI, NFS, or Fibre Channel SRs:

Got fabric scraps? Of course, you do! It’s a natural by-product of sewing and quilting. And it’s pretty awesome if you think of it. Instead of seeing it as “waste”, I like to see it as bonus opportunity to create again.

We’re back for the 3rd annual 30 Days of Improv QAL and today I’m sharing some top tips on how to get ready — including step-by-step guide on how to post on Instagram!