Specifications

19 – Configuring Extended Event Archiving
386 R400
Extended Event
Throttle Value
The maximum number of events that can be copied into the
online extended event file over the duration of a cycle period.
When the number of events generated per cycle period is
greater than the throttle value, typically in peak traffic periods,
the system goes into the overload state. The system will only
process the number of events specified in the throttle value
over each collection cycle period, so a backlog may occur.
When the number of events being generated decreases, the
system catches up by processing this backlog. The reason for
keeping the throttle value to a minimum is to ensure the
system does not take up too much of the server’s time
performing archiving functions instead of normal functions.
The default throttle value is 500. With the default cycle period,
this allows for a continuous average of more than one event
every second, which meets most applications. You can
increase the throttle value if your system generates events at a
higher continuous average rate. You should not lower the
throttle value.
If set to zero, all events generated since the last extended event
archive took place are moved into the online extended event
file at the end of the extended event cycle period.
Number Of Records In
Online Extended Event
File
The size of the online extended event file to be stored on the
hard drive.
100,000 events will take up approximately 60 Mb of hard disk
space. This includes:
20 Mb for the online file
20 Mb for the archive file
20 Mb for the playback file
It is recommended that you allow an extra 20% of hard disk
space for normal operation of the archiving system. For
example, if your system needs to cater for up to 500,000
events, then the hard disk space required is:
Space required for event storage: (500,000 / 100,000) * 60 Mb
= 300 Mb
Space for normal operation of the archiving system: 20% * 300
Mb = 60 Mb
Total hard disk space required = 300 Mb + 60 Mb = 360 Mb
Caution: If the system runs out of disk space to store the
archived files, your archive data may not be correctly saved.
Property Description
plscpcg.book Page 386 Monday, May 28, 2001 10:11 AM