Mark,
Thank you for figuring out the issue we are having. Question, is it
possible for us to roll back/downgrade the 389-ds to a "previously"
working version?
You'd have to go back to 389-ds-base-1.3.7, but I don't know if that's
possible on CentOS 7.6, you'd probably have to go back to CentOS 7.5 as
well I would think. :-(
Paul M. Whitney, RHCSA, CISSP
Chesapeake IT Consulting, Inc.
2680 Tobacco Rd
Chesapeake Beach, MD 20732
Work: 443-492-2872
Cell: 410.493.9448
Email: paul.whitney(a)chesapeake-it.com
<mailto:paul.whitney@chesapeake-it.com>
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*From:* Mark Reynolds <mreynolds(a)redhat.com>
*Sent:* Wednesday, January 16, 2019 12:16:19 PM
*To:* General discussion list for the 389 Directory server project.;
Paul Whitney; William Brown
*Subject:* Re: [389-users] Re: Problem with userRoot cache (last one)
On 1/16/19 12:05 PM, Mark Reynolds wrote:
>
>
> On 1/16/19 12:02 PM, Mark Reynolds wrote:
>>
>> Hi Paul,
>>
>>
>> Okay I think I found the bug you are running into:
>>
>>
>>
https://bugzilla.redhat.com/show_bug.cgi?id=1627512
>>
>>
>>
https://pagure.io/389-ds-base/issue/49618
>>
>>
>> So sounds like you need to upgrade to:
>>
>>
>> 389-ds-base-1.3.8.4-21 (RHEL/Centos 7.6)
>>
>>
>> Or build the upstream 1.3.7 server yourself using the commit found
>> in the pagure ticket above.
>>
> Apologies, you are on 1.3.8, so yeah you need to get on 1.3.8.4-21 or
> higher. Might have to wait for CentOS to pick up the latest builds?
Looks like 1.3.8.4-22 is going to be in RHEL(Centos) batch update 3.
So it's not available yet, sorry, but should be next month (not sure
how fast Centos picks up RHEL updates)
So in the meantime I would increase the autosize values to take
advantage of your RAM. See the wiki link I sent you earlier, and also
checkout the admin guide:
https://access.redhat.com/documentation/en-us/red_hat_directory_server/10...
Good luck,
Mark
>> Regards,
>>
>> Mark
>>
>>
>> On 1/16/19 11:38 AM, Mark Reynolds wrote:
>>>
>>> Hey Paul,
>>>
>>>
>>> On 1/16/19 10:14 AM, Paul Whitney wrote:
>>>>
>>>> We were on version: 389-ds-base-1.3.7.5-24.
>>>>
>>> What OS?
>>>
>>>
>>>
>>>>
>>>> The nsslapd-cache-autosize was set to 0. We apply our own values.
>>>>
>>>>
>>>> To keep us afloat we have been forced to enable
>>>> nsslapd-cache-autosize. However, our performance has degraded in
>>>> response times and feel we are not able to better
>>>> allocate/customize the cache settings as they relate to each database.
>>>>
>>>>
>>>> System: Virtual Machine
>>>>
>>>> 8-CPU
>>>>
>>>> 64GB RAM (of which 35G is free)
>>>>
>>>>
>>>> Two databases in the slapd instance:
>>>>
>>>> userRoot = 21G
>>>>
>>>> groupRoot = 1.8G
>>>>
>>>>
>>>> When we try to allocate anything above 50% for
>>>> nsslapd-cache-autosize, the service fails to start stating values
>>>> cannot exceed 100.
>>>>
>>>>
>>>> When we disable nsslapd-cache-autosize, and punch in our numbers:
>>>>
>>>>
>>>> nsslapd-cache-autosize = 0
>>>>
>>>> nsslapd-dbcachesize = 1073741824
>>>>
>>>> nsslapd-cachememsize = 2147483648 (groupRoot) and 23622320128
>>>> (userRoot)
>>>>
>>>>
>>>> Service overwrites our settings and sets both databases to
>>>> 2147483648. While that is ok for groupRoot, it is not for userRoot.
>>>>
>>>>
>>>> Based on this information, is there a way/recommendation to:
>>>>
>>>> 1. To force these values we enter to "stick"
>>>>
>>> Well setting autosize to zero and explicitly setting the cache
>>> attributes is all it should take for it to stick
>>>
>>>
>>>> 1. How can I better configure the auto cache sizing of these
>>>> entries?
>>>>
>>> Start here:
>>>
http://www.port389.org/docs/389ds/design/autotuning.html
>>> (checkout the manual tuning section)
>>>
>>>
>>> You can tune the autosizing to use more cache, but it is uniform
>>> across all backends: groupRoot and userRoot would use the same values.
>>>
>>>
>>>
>>>>
>>>> I would offer logs if I could, but we cannot get them off the
>>>> system. It is hosted in a disconnected environment.
>>>>
>>> The logs would say why the server thinks it needs to resize your
>>> caches (a bug?), but it sounds like autosizing is not the issue
>>> here since it is set to zero. I'm not sure what else I can offer
>>> up without more log information. I suspect the server is not
>>> properly detecting the 64gigs of memory, and thinks you have much
>>> less, which is why it's downsizing the cache values. This is all
>>> speculation without being able to look at the errors log (during
>>> startup). I find it very odd you can not get access to your own
>>> logs, it's such a vital part of the server, you should really get
>>> that addressed or else we can't really help you :(
>>>
>>>
>>> Regards,
>>>
>>> Mark
>>>
>>>>
>>>> Paul M. Whitney, RHCSA, CISSP
>>>> Chesapeake IT Consulting, Inc.
>>>> 2680 Tobacco Rd
>>>> Chesapeake Beach, MD 20732
>>>>
>>>> Work: 443-492-2872
>>>> Cell: 410.493.9448
>>>> Email: paul.whitney(a)chesapeake-it.com
>>>> <mailto:paul.whitney@chesapeake-it.com>
>>>> *CONFIDENTIALITY NOTICE*
>>>> The information contained in this facsimile or electronic message
>>>> is confidential information intended for the use of the individual
>>>> or entity named above. If the reader of this message is not the
>>>> intended recipient, or an employee or agent responsible for
>>>> delivering this facsimile message to the intended recipient, you
>>>> are hereby notified that any dissemination, or copying of this
>>>> communication is strictly prohibited. If this message contains
>>>> non-public personal information about any consumer or customer of
>>>> the sender or intended recipient, you are further prohibited under
>>>> penalty of law from using or disclosing the information to any
>>>> third party by provisions of the federal Gramm-Leach-Bliley Act.
>>>> If you have received this facsimile or electronic message in
>>>> error, please immediately notify us by telephone and return or
>>>> destroy the original message to assure that it is not read,
>>>> copied, or distributed by others.
>>>>
>>>> ------------------------------------------------------------------------
>>>> *From:* William Brown <wbrown(a)suse.de>
<mailto:wbrown@suse.de>
>>>> *Sent:* Tuesday, January 15, 2019 7:22:18 PM
>>>> *To:* 389-users(a)lists.fedoraproject.org
>>>> <mailto:389-users@lists.fedoraproject.org>
>>>> *Cc:* Paul Whitney
>>>> *Subject:* Re: [389-users] Problem with userRoot cache
>>>>
>>>>
>>>> > On 16 Jan 2019, at 06:49, Mark Reynolds <mreynolds(a)redhat.com>
>>>> <mailto:mreynolds@redhat.com> wrote:
>>>> >
>>>> > What version were you previously on?
>>>> >
>>>> > Sounds like an issue with autocache sizing. The errors log
>>>> might give more info about why its being reset.
>>>> >
>>>> > Also check if "nsslapd-cache-autosize" is set under
>>>> "cn=config,cn=ldbm database,cn=plugins,cn=config". If it is,
set
>>>> it to zero to stop the autosizing.
>>>>
>>>> Certainly is sounds like autosizing is still enabled here and is
>>>> just resetting your values on you.
>>>>
>>>> >
>>>> >
>>>> > On 1/15/19 3:42 PM, Paul Whitney wrote:
>>>> >> We recently updated to 389-ds-base-1.3.8.4-18. I am not sure I
>>>> can attribute this issue to this update since we are now just
>>>> discovering it. But setting the nsslapd-cachememsize is reverting
>>>> to a default value of 2GB. I have attempted to restore the value
>>>> through the console and restarting the instance. I have also tried
>>>> by stopping instance and manually editing the dse.ldif file. In
>>>> both cases, the value is replaced with 2GB value.
>>>> >>
>>>> >> Any suggestions?
>>>> >>
>>>> >> Paul M. Whitney
>>>> >> RHCSA, VCP, CISSP, Security+
>>>> >> Chesapeake IT Consulting, Inc.
>>>> >> 2680 Tobacco Rd
>>>> >> Chesapeake Beach, MD 20732
>>>> >>
>>>> >> Work: 443-492-2872
>>>> >> Cell: 410.493.9448
>>>> >> Email: paul.whitney(a)chesapeake-it.com
>>>> <mailto:paul.whitney@chesapeake-it.com>
>>>> >> CONFIDENTIALITY NOTICE
>>>> >> The information contained in this facsimile or electronic
>>>> message is confidential information intended for the use of the
>>>> individual or entity named above. If the reader of this message is
>>>> not the intended recipient, or an employee or agent responsible
>>>> for delivering this facsimile message to the intended recipient,
>>>> you are hereby notified that any dissemination, or copying of this
>>>> communication is strictly prohibited. If this message contains
>>>> non-public personal information about any consumer or customer of
>>>> the sender or intended recipient, you are further prohibited under
>>>> penalty of law from using or disclosing the information to any
>>>> third party by provisions of the federal Gramm-Leach-Bliley Act.
>>>> If you have received this facsimile or electronic message in
>>>> error, please immediately notify us by telephone and return or
>>>> destroy the original message to assure that it is not read,
>>>> copied, or distributed by others.
>>>> >>
>>>> >>
>>>> >>
>>>> >> _______________________________________________
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>>>> >>
>>>> >> To unsubscribe send an email to
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>>>> >>
>>>> >> Fedora Code of Conduct:
>>>> >>
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>>>> —
>>>> Sincerely,
>>>>
>>>> William Brown
>>>> Software Engineer, 389 Directory Server
>>>> SUSE Labs
>>>>
>>>>
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