On Tue, 08 Dec 2020 14:56:11 +0100, Steinar H. Gunderson wrote: > On Tue, Dec 08, 2020 at 02:49:48PM +0100, gregor herrmann wrote: > > Maybe something like `ulimit -n 131072' in /etc/cron.daily/plocate > > would be a good idea? (It seems to work for me.) > This is a bit strange, because updatedb attempts the same thing itself, > by means of setrlimit (and there's no reason why bash should be allowed > to if updatedb isn't). Do you think you could strace it and see what happens > with the getrlimit() and setrlimit() calls?
# strace -f -v -o /tmp/plocate /usr/sbin/updatedb.plocate
/usr/share/doc/python3-webencodings: Too many open files
Hint: Try `ulimit -n 8192' or similar (current limit is 4096).
% grep -i rlimit /tmp/plocate
23774 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024,
rlim_max=RLIM64_INFINITY}) = 0
23774 prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=4*1024, rlim_max=4*1024}) = 0
23774 prlimit64(0, RLIMIT_NOFILE, {rlim_cur=4*1024, rlim_max=4*1024}, NULL) = 0
23774 prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=4*1024, rlim_max=4*1024}) = 0
It looks like changing the value to 131072 doesn't work. With
#v+
--- a/updatedb.cpp
+++ b/updatedb.cpp
@@ -745,6 +745,14 @@
rlim_t wanted = std::max<rlim_t>(rlim.rlim_cur, 131072);
rlim.rlim_cur = std::min<rlim_t>(wanted, rlim.rlim_max);
setrlimit(RLIMIT_NOFILE, &rlim); // Ignore errors.
+
+ if (getrlimit(RLIMIT_NOFILE, &rlim) == -1) {
+ fprintf(stderr, "Hint: getrlimit failed.\n");
+ } else {
+ fprintf(stderr, "Hint: getrlimit: current limit is %lu,
max limit is %lu.\n",
+ rlim.rlim_cur, rlim.rlim_max);
+ }
+
}
conf_prepare(argc, argv);
#v-
I get:
# /usr/sbin/updatedb.plocate
Hint: getrlimit: current limit is 4096, max limit is 4096.
/usr/share/doc/python3-webencodings: Too many open files
Hint: Try `ulimit -n 8192' or similar (current limit is 4096).
If I run the patched cronjob, i.e.
ulimit -n 131072
flock --nonblock /run/plocate.daily.lock $NOCACHE $IONICE nice $UPDATEDB
I see:
Hint: getrlimit: current limit is 131072, max limit is 131072.
Cheers,
gregor
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