TTree memory limit

[Wile_E_Coyote]

@pcanal The “hadd” is used here.

@OtaviusDecius Try:

Root 6.04.14 hadd 100Gb and rootlogon

Indeed hadd does not load the rootlogon file. However you can still manager using the following pattern. Use a source file (let’s called it startup.C) like #include "TTree.h" int startup() { TTree::SetMaxTreeSize( 1000000000000LL ); // 1 TB return 0; } namespace { static int i = startup(); } compile it into a shared library, for example with: root.exe -b -l -q startup.C+ and then use LD_PRELOAD (DYLD_INSERT_LIBRARIES on MacOS) to preload that library: DYLD_INSERT_LIBRARIES=startu…