Rick Stevens writes:
On 09/10/2016 08:09 AM, Sam Varshavchik wrote: > Sam Varshavchik writes: > >> Tom Horsley writes: >> >>> On Sat, 10 Sep 2016 10:20:57 -0400 >>> Sam Varshavchik wrote: >>> >>> > All-righty, this must be something about this particular named-chroot >>> > configuration… >>> >>> In the "check the dumb stuff first" category, might want to >>> run memtest and check the SMART info on the disk. Always a >>> chance the code got corrupted somehow and isn't running the >>> instructions intended to run :-). >> >> I copied the chroot to another server that I can play with. On that >> one, named-chroot also segfaults at startup in the same way, so it >> looks like I have a weekend project… > > I have this "options" directive in place for decades: > > datasize 20M; > > Commenting it out allows named to start up. I'll try it on my main > server, the next time I reboot it. Something about 4.7.2 that makes > named blow up, with this directive in place. Uhm, since that limits the size of memory that named can use, have you tried increasing it? I agree that a new kernel shouldn't cause it to puke unless there's something wrong with the way RAM is being allocated in the kernel (or the limit is actually being enforced in the new kernel and it wasn't in the older ones). It'd be interesting if you had a top report of the memory usage of named under the old kernel and the new kernel (with the directive disabled), just to see what the memory footprint differences are. Might point toward something interesting.
Yeah, something's definitely going on. Freshly restarted named: 4.7.2:PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 29156 named 20 0 702528 83324 6360 S 12.5 2.1 0:00.23 named
4.6.7:PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
10208 named 20 0 407084 81908 6828 S 12.5 1.0 0:00.13 namedWith 4.7.2, it's virtual space is nearly twice as much, also RES is just slightly bigger.
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