Dell Unity: Details About The Unity Performance Metrics Aging Policy (User Correctable)

Summary: What is the Unity Performance Metrics Aging Policy and the length of retention for Unity Performance Archive (UPA) files?

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
Check out other resources

Instructions

Performance metrics database

Performance metrics data is located in a database stored on the first four system drives. This performance database space is fixed at 16 GB in size and is automatically reserved on every storage system. The fixed size allows the system to retain historical metrics for a fixed duration of time, although not indefinitely (see section 1.2). The target for total consumed space for storing metrics is 70% of the available 16 GB reserved system space for metrics. If there is a lack of space, the system decreases the retention period for the oldest metrics while attempting to retain at least 24 hours' worth of data for all collected metrics. 

Performance metrics aging policy

Performance metrics data is consolidated and averaged depending on the age of the data so that the metrics database can hold older data for longer periods. For example, data that is greater than 3 days old is consolidated from 1-minute intervals to 5-minute intervals for a longer sampling interval. The same concept is applied at 14 and 28 days, respectively. Table 1 shows the full list of metric retention periods and associated sampling intervals. More information can be found at Dell EMC Unity: Performance Metrics (October 2019) on page 6.

 

Sampling intervals and retention periods

Affected Products

Dell EMC Unity, Dell Unity 450F DC, Dell Unity 300, Dell Unity 300 DC, Dell EMC Unity 300F, Dell EMC Unity 350F, Dell Unity 350F DC, Dell EMC Unity XT 380, Dell EMC Unity XT 380F, Dell EMC Unity 400, Dell Unity 400 DC, Dell EMC Unity 400F , Dell EMC Unity 450F, Dell EMC Unity XT 480, Dell EMC Unity XT 480F, Dell EMC Unity 500, Dell EMC Unity 500F, Dell EMC Unity 550F, Dell EMC Unity 600, Dell EMC Unity 600F, Dell EMC Unity 650F, Dell EMC Unity XT 680, Dell EMC Unity XT 680F, Dell EMC Unity XT 880, Dell EMC Unity XT 880F, Dell EMC Unity Family |Dell EMC Unity All Flash, Dell EMC Unity Hybrid ...
Article Properties
Article Number: 000022757
Article Type: How To
Last Modified: 11 ديسمبر 2025
Version:  5
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.