offline-installer: pathelf causes std::bad_alloc on small memory environment

[syuu1228]

When I tried to run offline installer on Vagrant based VM, I got following error:

$ sudo ./install.sh 
patchelf: std::bad_alloc

This seems like out of memory, since the VM only has 1GB memory. So the error is not really a bug, but we at least better to describe it in the document.

Note that the error occurs at patching to libexec/scylla:

+ adjust_bin scylla
+ local bin=scylla
+ patchelf --set-interpreter /opt/scylladb/libreloc/ld.so ///opt/scylladb/libexec/scylla
+ LD_LIBRARY_PATH=/home/vagrant/unified/scylla/libreloc
+ libreloc/ld.so libexec/patchelf --set-interpreter /opt/scylladb/libreloc/ld.so ///opt/scylladb/libexec/scylla
patchelf: std::bad_alloc

Probably because it is largest binary, uses more memory.

[slivne]

@penberg / @syuu1228 we need to document the memory limitations for offline-installer - what is the minimum memory size offline-installer can work with

[syuu1228]

Seems like the error causes because of scylla binary size (1.4GB), memory size = 2.0GB should be enough.

$ ls -lh libexec/scylla 
-rwxr-xr-x. 1 syuu docker 1.4G Jan  4 13:05 libexec/scylla

[syuu1228]

I tested on 0.5GB / 1.0GB / 2.0GB RAM VMs, 2GB VM worked fine, others cause bad_alloc.