<p>Wall clock timing measurements for --rebuilddb using RPM+NDB take minutes, not seconds:</p>
<pre><code>[jbj@ji rpm]$ /usr/bin/time sudo ./rpmdb --rebuilddb --ndb
3.44user 3.86system 10:27.01elapsed 1%CPU (0avgtext+0avgdata 48152maxresident)k
0inputs+3334040outputs (0major+444636minor)pagefuls 0swaps
</code></pre>
<p>Looking at the code, the problem appears to start with the function ndb_SetFsync() in lib/backend/ndb/glue.c (which makes no attempt to propagate the nofsync disabling on --rebuilddb<br>
to the underlying pkgdb/pkgxdb even though there appears to be some attempt at fsync disabling there):</p>
<pre><code>static void ndb_SetFSync(rpmdb rdb, int enable)
{
}
</code></pre>

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