Add code by Benjamin to print GC settings, increase heap size limit

test/runtests.jl

@@ -2,8 +2,24 @@ using AbstractAlgebra
 
 using Test
 
+
 if VERSION >= v"1.8.0"
   GC.enable_logging(true)
+
+  # print gc settings
+  jlmax = @ccall jl_gc_get_max_memory()::UInt64
+  totalmem = @ccall uv_get_total_memory()::UInt64
+  constrmem = @ccall uv_get_constrained_memory()::UInt64
+  println("Memory:   max: ", Base.format_bytes(jlmax))
+  println("        total: ", Base.format_bytes(totalmem))
+  println("       constr: ", Base.format_bytes(constrmem))
+
+  if VERSION >= v"1.10.0-"
+    # adjust heap size hint
+    memenv = parse(Int, get(ENV, "OSCARCI_MAX_MEM_GB", "5")) * 2^30
+    println("Setting heap size hint to ", Base.format_bytes(memenv))
+    @ccall jl_gc_set_max_memory(memenv::UInt64)::Cvoid
+  end
 end
 
 include("Aqua.jl")