Last Modified: Apr 10, 2019
Opened: Mar 24, 2017
When viewing data for Last 12 hours or Last Day for Virtual Servers or Pool and Pool Members, you may see timeouts when BIG-IQ attempts to display the data.
Charts for virtual server and pool & pool member inspector pages may show timeouts when querying for last 12 hours and last day of data.
This occurs from a confluence of several potential items: 1. The default retention for the raw data time layer is set at greater than 10 hours. 2. Your environment does not have sufficient Data Collection devices to support the scale of your environment. 3. The storage for your Data Collection devices is too slow.
The BIG-IQ uses the raw time layer for the 12-hour and Last Day queries if the retention policy for the raw time layer is greater than 12 hours and 24 hours respectively. This causes a significant I/O burden to fulfill the query request. In some cases, this may be due to poor storage I/O performance for your Data Collection device(s) and/or not enough Data Collection devices to serve the needs of your environment. The BIG-IQ supports up to 5 Data Collection devices for collection of statistical data. When configuring virtual instances of Data Collection devices, ensure the underlying physical storage is spread out across physical disks, rather than shared on the same physical disk. If the issue cannot be resolved with infrastructure changes, you can change the raw time layer default back to 10 hours.
This issue is now fixed.