Re: performance degrades over time on CentOS 7

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rpm -q 389-ds-base?

I wonder you are running the latest version?

https://git.centos.org/summary/rpms!!389-ds-base
2016-11-03 imports/c7/389-ds-base-1.3.5.10-11.el7 import 389-ds-base-1.3.5.10-11.el7 tag | commit | log


On 11/15/2016 04:51 PM, Gordon Messmer wrote:
On 11/15/2016 12:08 PM, Rich Megginson wrote:
It is also useful to get a few stacktraces which will give us detailed information about what the server is doing.  For example, if you can "catch" the server while it is misbehaving, and get stacktraces every second for 10 seconds. http://www.port389.org/docs/389ds/FAQ/faq.html#debugging-hangs


This might be really good news:  In addition to oddly high CPU utilization, we sometimes see slapd lock up completely.   I managed to catch the server in such a state and get a backtrace. Can you let me know if this clarifies the problem at all?

When the server wedged, an ldap client would complete a connect() call to establish the connection, write some data, and then hang indefinitely:

connect(3, {sa_family=AF_INET6, sin6_port=htons(389), inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = 0
write(3, "0>\2\1\1c9\4\0\n\1\0\n\1\0\2\1\0\2\1\0\1\1\0\207\vobjectclass0\31\4\27supportedSASLMechanisms", 64) = 64
poll([{fd=3, events=POLLIN|POLLPRI}], 1, 4294967295) = ? ERESTART_RESTARTBLOCK (Interrupted by signal)

I'd been running dbmon.sh in a terminal, and it had hung with no output for several minutes.  The last thing it printed was rather normal:

      dbname      count          free  free%    size
userroot:ent       3607      78692851   75.0  7253.9
userroot:dn        3607      10162827   96.9    89.5



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