MySQL Bugs: #71582: Browser performance degraded by MEM usage

Bug #71582	Browser performance degraded by MEM usage
Submitted:	4 Feb 2014 9:35	Modified:	9 Jan 2015 10:13
Reporter:	Simon Mudd (OCA)	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Enterprise Monitor: Web	Severity:	S3 (Non-critical)
Version:	3.0.5	OS:	MacOS (Mavericks)
Assigned to:		CPU Architecture:	Any
Tags:	windmill

Description:
I use Chrome to look at the MEM dashboard. I've noticed as the number of servers that's being monitored has grown that performance of the browser has started to get sluggish and sometimes blocks (scrolling does not work) and also if looking at other web pages in other tabs, these are affected by the (background) MEM tab doing things.

This also seems to affect other applications I'm using sometimes (e.g. working from a terminal shell) and that is also rather frustrating. This only happens when a MEM tab is open in the browser.

Graph tabs are usually set to monitor the last day of data.

This obviously depends on the number of servers that are being monitored. Currently that number is over 100. More complete details provided privately.

How to repeat:
See above.

My hardware is MacBookPro with 8 GB of RAM with a few applications open and many terminal connections to different systems.  The load produced by Chrome now can sometimes be quite a nuisance. I used to use Firefox and Chrome seemed to behave better in the MEM 2.3 days, so worrying I'm seeing this on MEM3 with not such a large setup.

Suggested fix:
Please remember that users often have several tabs open in a browser and that the resources the browser should give to the MEM tab are not infinite. You should try to avoid blocking behaviour of other tabs.