Collection
intervals determine the duration for which statistics are aggregated,
calculated, rolled up, and archived. Together, the collection interval and
collection level determine how much statistical data is gathered and stored in
your
vCenter Server
database.
Collection
Intervals
Collection Interval/Archive Length



1 Day

5 Minutes

Realtime statistics
are rolled up to create one data point every 5 minutes. The result is 12 data
points every hour and 288 data points every day. After 30 minutes, the six data
points collected are aggregated and rolled up as a data point for the 1 Week
time range.
You can change the
interval duration and archive length of the 1 Day collection interval by
configuring the statistics settings.

1 Week

30 Minutes

1 Day statistics are
rolled up to create one data point every 30 minutes. The result is 48 data
points every day and 336 data points every week. Every 2 hours, the 12 data
points collected are aggregated and rolled up as a data point for the 1 Month
time range.
You cannot change the
default settings of the 1 Week collection interval.

1 Month

2 Hours

1 Week statistics are
rolled up to create one data point every 2 hours. The result is 12 data points
every day and 360 data points every month (assuming a 30day month). After 24
hours, the 12 data points collected are aggregated and rolled up as a data
point for the
1
Year time range.
You cannot change the
default settings of the 1 Month collection interval.

1 Year

1 Day

1 Month statistics are
rolled up to create one data point every day. The result is 365 data points
each year.
You can change
the archive length of the 1 Year collection interval by
configuring the statistics settings.

Note
If you change the
duration of data collection intervals you might need to allocate more storage
resources.