Re: memory release problem in mathematica6.0
- To: mathgroup at smc.vnet.net
- Subject: [mg83317] Re: memory release problem in mathematica6.0
- From: Nacho <ncc1701zzz at gmail.com>
- Date: Sat, 17 Nov 2007 05:26:11 -0500 (EST)
- References: <email@example.com>
Hello. I think that your confusion is because Mathematica also saves a copy of the results in the Out array. Every operation is saved, so you can recall any previous output (and input). It is saved even if you use ; to discard the output. I have found that when working with bif data sets or a lot of time, the memory consumption is bigger and bigger. You can limit the amount of history length with the variable $HistoryLength For example, if the first execution you do in Mathematica is $HistoryLength=2; only the 2 last results will be saved. You can disable all the output history with $HistoryLength=0 but then you cannot use % to call the previous result. with $HistoryLength=0 you can run a = RandomInteger[10, 10000000]; Clear[a] as much as you want, but the memory is increased just the first time, Hope this help. Regards. On Nov 14, 10:49 am, jack <giaber... at gmail.com> wrote: > Hi all, > When i define large data structures, for example an array "A" of > million of elements that occupy some hundreds of MB of physical > memory,when i clear it, with Clear[A] memory isn' t released by > operating system. I' ve tried both on windows and linux. > The result of MemoryInUse command of mathematica but the physical > memory reported by the system monitor isn't released. > I' ve tried also ClearSystemCache but with no result. > Am i missing something? > > Thanks!