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Home > Success Center > Log & Event Manager (LEM) > LEM - Knowledgebase Articles > Manage the LEM Database and required storage space

Manage the LEM Database and required storage space

Created by Tim Rush, last modified by James Moore on Aug 30, 2018

Views: 3,749 Votes: 3 Revisions: 25

Updated: August 30, 2018

Overview

The LEM database is self-managed by the application. Once the database has consumed up to 90% of available storage space, the oldest events are overwritten.

Environment

LEM version 5.6 and later

Detail

LEM is a network appliance, virtualized for ease of management, and requires a minimum of 250GB of storage space. When log retention time needs to be increased, LEM size can be increased to 2.0 TB in versions 5.6.x through 6.3.x.

When you increase the size of your virtual appliance, use the following guidelines:

  • You can exceed the 2 TB limit with a fresh LEM deployment (for versions 6.4 and 6.5 only). If your upgrade path included 6.3.1 and older, please contact Customer Support for assistance.
  • The maximum virtualization platform disk size for Hyper-V:
    • VHD - 2TB, for very old Hyper-V only.
    • VHDX (recommended) - 2TB or more is supported.

Database size

The database is contained within the LEM virtual machine, with no option for an external database. By default the database size will consume 90% of the available storage space (after operating system and application requirements).

Retention period

Where auditing requirements require a specific retention period for logs, LEM chooses to use 'size'. To calculate the retention period, launch the Database Maintenance Report (DBM) or create a scheduled weekly or monthly report for this. The report will display "Database Time Span (days)" for the retention period, but storage space consumed must also be checked.

If the DBM shows a Time Span of 90 days and the database has consumed 45% of the available storage space, the retention period is 180 days (6 months).

If the DBM shows a Time Span of 90 days and the database has consumed all 90% of the available storage space, the retention period is 90 days.

If auditing requires a retention period of 180 days (6 months), the DBM shows a Time Span of 90 days, and the database consumes all 90% of the available storage, the LEM size needs to be doubled. See Resize a LEM virtual appliance for more information.  

 

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