About Purge - HPE XP7 User Manual

About Purge

You can manually purge configuration and performance data for an XP or an P9500/XP7 disk array, or
data older than the current specified date. PA can automatically purge data.
• Initially, when PA Is installed and performance data collection is not yet scheduled, the following
message is displayed: Important: Either collections are not being performed or
the database size has not yet reached 5GB. Performance collection must be
initiated and the database size must be at least 5GB for Auto Purge
Forecasting.
After the performance data collection is initiated and the database size increases to 5 GB, PA displays
a forecast message on the Purge pane. The forecast message indicates the approximate duration by
when auto purge starts if the current data collection trend continues.
• When you purge data for an XP or an XP7 disk array, the corresponding configuration and
performance data are permanently removed from the database.
• When you purge data for a specified duration, only the performance data collected for the XP and the
XP7 disk arrays during that duration is permanently removed from the database. You can continue to
collect performance data for those arrays, as their configuration data still exists in the database.
Purging data eventually increases the performance of PA, as considerable amount of disk space used by
the database is released back.
CAUTION:
The data that is purged cannot be recovered. It is permanently deleted from the PA database.
Hence, purge data only when you are absolutely sure that the data is no longer required. Also, PA
activities, such as plotting charts and collecting data might be impacted when either the manual or
auto purge is in progress.
Alternatively, if you want to archive data before purging it, use the archival export functionality. For more
information, see Archive data on page 151.
IMPORTANT:
The current date and time on your management station (where PA is installed) is considered for
deleting the records.
About automated data purge
PA automatically purges performance data that belongs to XP and XP7 disk arrays, if either of the
following conditions are met:
• The database size has reached x% of configured maximum database size, where x is the threshold
value specified in purgeparameters.properties file. By default the threshold value is 70%.
• When the available disk space is y GB or lesser than y GB, where y is the disk space value specified
in purgeparameters.properties file.
Before reaching above mentioned conditions, the following predictions on when auto purge starts is
displayed on the Purge/Archive screen:
Important: Based on available disk space, in 7 day(s), auto-purging will
begin..
Before reaching above mentioned conditions, the following warning messages will be displayed on the
Purge/Archive screen and an event will be logged which can be viewed in the event log screen.
About Purge 147