![]() However, operating systems tend to reserve about half of the available memory for their own use. It would be impossible to uniquely identify individual blocks of memory beyond the 4 GB limit. Thus, with 32-bit memory addresses, there is a hard cap of 4 GB of memory. The largest 32-bit number is about 4 billion. 64-bit programs, we are really talking about the number of bits available to address memory. What's all this 2 GB talk? I thought 32-bit programs had access to 4 GB of memory. The upshot? On a device with 32 GB of physical memory and a 64-bit O/S, our Access application has less than 1 GB of memory to work with. Take note that out of 2 GB of total virtual memory at our disposal, Access gobbled up nearly 60% of that in pure startup overhead. I encourage you to try this yourself and post the results in the comments below (to get the build info, go to File > Account > About Access). The results are shown in the screenshot above. I closed and reopened the application, then ran the ShowMemStats routine. I copied the above code to a new code module. Private Function BytesToXB(Value As Long) As StringīytesToXB = Round(Value / (2 ^ 30), 2) & " GB"īytesToXB = Round(Value / (2 ^ 20), 2) & " MB"īytesToXB = Round(Value / (2 ^ 10), 2) & " KB" 'Convert raw byte count to a more human readable format Here's the sample code ( UPDATE the code below only works in 32-bit VBA for 64-bit VBA-compatible code, see 64-bit Unsigned Integers in VBA): Option Compare Databaseĭeclare PtrSafe Sub GlobalMemoryStatus Lib "kernel32" (lpBuffer As MEMORYSTATUS)ĭebug.Print "Total memory:", BytesToXB(Mem.dwTotalVirtual)ĭebug.Print "Memory used: ", BytesToXB(Mem.dwTotalVirtual - Mem.dwAvailVirtual)ĭebug.Print "Memory free: ", BytesToXB(Mem.dwAvailVirtual)ĭebug.Print "Pct used: " Format((Mem.dwTotalVirtual - Mem.dwAvailVirtual) / Mem.dwTotalVirtual, "0.00%") To demonstrate this, I'm using the GlobalMemoryStatus API. In fact, with the latest 32-bit version of Access ( Version 2110 (Build 14527.20276 Click-to-Run)), over half of the memory available gets gobbled up by Access: With each new version, the Access engine itself uses more memory than the version before. ![]() ![]() Does it seem like the "Out of memory" and "System resource exceeded" errors are cropping up more than they used to in 32-bit versions of Microsoft Access? Holy Bloated Access, Batman! ![]()
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