Igor Sverkos wrote: > As you can see, it is always the "Unpacking" step which is taking all the > time.
dpkg has added fsync() calls after all file actions. This significantly slows down file operations. Basically it disables the file system buffer cache causing it to operate at disk drive speeds. This is why unpacking files is quite a bit slow. > Everything seems to be fast. Unpacking kernel sources (tar -xaf > linux-3.16.6.tar.xz) is no problem. Daily work is no problem. > But when it comes to apt/aptitude and installing/updating packages, > the system is very slow. > > Any ideas/hints? Install 'eatmydata' and use it when installing. apt-get install eatmydata eatmydata apt-get install stuff... I expect this suggestion to be followed by many people griping that my suggestion is unsafe and that the years and years we spent living without fsync() were unsafe. But we did. We had at least a decade of fast systems in the "before time". And the system was much faster then and life was good. Therefore I include the warning that you must decide yourself if you agree or disagree with flushing the cache and running at hard disk speeds or enabling buffer cache and running at ram buffer cache speeds. Personally I use the LD_PRELOAD library for everything. YMMV. Bob
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