The Original article can be referenced here: http://www.virtuallyghetto.com/2013/11/quick-tip-useful-flash-player.html
A useful tidbit from as the article state VMware engineering on a Flash Player optimization setting that can be helpful when using the vSphere Web Client or any other Flash web application for that matter. The particular setting is the Website Storage Settings which controls the amount of temporary data that can be stored by the Flash Player on your local disk and by default this is limited to 100Kb. This limited storage footprint is actually done on purposes as a security feature of Flash.
However, at some point the Flash Player will reach this limit and prompt the user to allow additional disk space to be consumed and this is where you may see the vSphere Web Client crash and you would to go through the motions of logging back in.
To avoid this scenario, you can change the default 100Kb to unlimited for a particular site which I was recommended so that I would not hit this problem. I do want to stress that this is not a VMware best practice but more of a general Flash Player best practice but I think it is something to be aware of and could help from a usability perspective.
To check your current settings, Adobe has made it very simple by just navigating to the following URL: http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager07.html
A panel will load and you will get access to a variety of Flash Player settings including the Website Storage Settings which is what the link above will default to.
You will now be able to browser to the particular website, in our case we will be looking for either the hostname or IP Address of your vSphere Web Client Server and you will be able to see its current usage as well as limit. To change the default, you just need to click on the website and then move the toggle at the top to the far right which will show up as "unlimited". I would recommend you make this change for all your vSphere Web Client servers that you access. It would have been nice to see our vSphere Web Client automatically detect this and recommend the change or automatically default to this setting.
Global Storage Settings panel
Note: The Settings Manager that you see above is not an image; it is the actual Settings Manager. Click the tabs to see different panels, and click the options in the panels to change your Adobe Flash Player settings.
Websites might occasionally want to store information, such as your high score from a game that runs in Flash Player or what products you have purchased, to your computer. In the Global Storage Settings panel, you can control how much disk space websites can use to store information, or you can prohibit websites from storing any information at all. (If you prohibit websites from storing information, the website might or might not function as intended.)
Use this panel to specify the default storage settings for websites that you haven't yet visited. (To change settings for websites you have already visited, use the Website Storage Settings panel.) The following list explains the storage options:
- If you don't want to let applications from any website save information on your computer, and you don't want to be asked again, select Never Ask Again. This action doesn't delete any information that is already stored. (To delete existing information, use the Delete options in the Website Storage Settings panel.)
- If you want to decide on a case-by-case basis whether applications from a website can save information on your computer, move the slider to the far left (None). Each time an application wants to save information on your computer, you will be asked for more disk space.
- If you want to let applications from any website save as much information on your computer as they need to, move the slider to the far right (Unlimited).
- If you want to let applications from any website save information on your computer, but want to limit the amount of disk space they can use, move the slider to select 10 KB, 100 KB, 1 MB, or 10 MB. If an application needs more space than you have allotted, you will be asked for more disk space while the application is running.
- (Flash Player 8 and later) If you do not want to let third-party content store information on your computer, deselect Allow Third-Party Content To Store Data On Your Computer.
When you visit a website, the address shown in the browser address bar is usually where most of the website is located. For example, if you visit a fictional website www.[hotel].com, most of the website is located at www.[hotel].com. Sometimes, websites combine content from different sources. For example, www.[hotel].com might display a reservations form in Flash that actually comes from [reservations.hotel].com. The content from the latter website is called third-party content.
Third-party content might try to store information on your computer. In the hotel reservations example, you might be willing to let [reservations.hotel].com store information on your computer, such as data about which hotels you prefer, so that you can make a hotel reservation. However, you might not be willing to let third-party content store information on your computer in other situations. For example, a car-rental company, www.[my-car-rental].com, might have a banner ad on www.[hotel].com, to track your website usage or to record your preferences.
To prohibit all third parties from storing information on your computer, deselect Allow Third-Party Content To Store Data On Your Computer. This option is available only with Flash Player 8 and later. Adobe recommends that you upgrade to the most recent version of Flash Player available.
- (Flash Player 18.104.22.168 and later) If you do not want to store Flash components on your computer, deselect Store Common Flash Components To Reduce Download Times.
Flash Player lets you store common or shared SWF and FLV files and other components from different websites on your computer to significantly reduce download times and allow faster viewing. For example, www.[hotel].com and [reservations.hotel].com might both use the same Adobe components on their sites.
For an overview of issues related to storage, see What are storage settings? in the discussion of the Settings Manager.
Adobe article on the Settings Manager in Flash Player