When it is first run, the Skype for Business 2015/2016 32-bit client generally uses between 100 and 300k of memory. This 4GB is then cut in half so that the process really only has 2GB and the Operating System gets the other 2GB (note that this changes if every binary in a process is large address aware – but Skype isn’t large address aware because some of the dynamic link libraries it loads aren’t).ĢGB of memory seems like a lot and, when S4B is first opened, it really is.
In 32-bit architecture, each process only has 4GB because a 32-bit register can only address 4GB of memory space. Required – that is, the buffer memory CANNOT be segmented it must be in one long array of bytes. That equation becomes 6140 x 1900 x 4 bytes (since a byte is 8-bits, then 32 bits is 4 bytes) for a total of about 46.7 megabytes of Finally, it multiplies the product by the highest bitplane (32bpp or 32 bits-per-pixel, in this case). S4B adds up the horizontal resolutions (800 + 3440 + 1900 = 6140) and multiplies the total by the largest of the vertical resolutions (1900, in this case). Let’s say you have three monitors on your computer with resolutions of 800圆00x8bpp, 3440x1900x32bpp, and 1900x1600x16bpp respectively. Once S4B has calculated width times height, it multiplies that total by the maximum number of color bit-planes supported by any of the monitors.Īn example might describe this process better. To do this, it adds up the horizontal resolution of all of the monitors and multiplies that total by the largest vertical resolution of any of the monitors. S4B keeps track of this data by creating a buffer that is large enough to accommodate the color of every pixel on every monitor.
When Skype for Business 2015 or 2016 is used for application sharing, it needs to be aware of every pixel on every monitor because the end-user can move the window for the shared application to any monitor at any time. The problem here isn’t really with S4B but rather with the 32-bit architecture. The latter case is especially true when several of the existent monitors are running with a high resolution (such as running several 2k monitors, 4k monitors or above a 2k monitor is any monitor with a horizontal resolution of 2,000 pixels or more and 4k monitors are those that support a horizontal resolution of 4,000 pixels or more). This usually happens when S4B has been running continuously for a long period of time (think many days or even weeks) and/or when Skype for Business is running on a display containing multiple monitors. We’ve seen a large number of cases come through recently where application sharing with 32-bit Skype for Business 2015 and 32-bit Skype for Business 2016 clients (collectively, S4B) is failing intermittently. , Senior Escalation Engineer, Skype for Business First published on TECHNET on Apr 11, 2018
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