[Rpm-maint] [rpm-software-management/rpm] Consider available memory and address space for parallel execution (PR #2418)

[Michal Domonkos]

@dmnks commented on this pull request.



> +    long int pagesize = sysconf(_SC_PAGESIZE);
+    long int pages = sysconf(_SC_PHYS_PAGES);
+
+    if (pagesize < 0)
+	pagesize = 4096;
+    if (pages > 0)
+	mem = pages * pagesize;
+
+    return mem;
+}
+
+static unsigned long getmem_proc(int thread)
+{
+    unsigned long mem = getmem_total();
+    /*
+     * Conservative estimates for thread use on 32bit systems where address

Just curious (no nitpick here), where do these estimates come from? They don't seem totally arbitrary so I suppose there's some technical reason behind them?

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