Re: [Wrapper-user] Disable OOM killer for process?

[Casey J. <cas...@jo...>]

Thanks Leif,

So I the main thing I need to ensure is that this gets run as root, since
the command I need to run will only be effective as root. It seems to me
that the first method won't allow me to do that, since I will already be
inside the JVM executing that code right?

Will the event script method allow me to do this?

Thanks!



On Sun, Sep 27, 2015 at 9:11 PM Leif Mortenson <
lei...@ta...> wrote:

> Casey,
> This would need to be done after the JVM is launched.
> You can get the PID from within the JVM with WrapperManager.getJavaPID()
> or by using the wrapper.java.pidfile property.
>
> But the easiest way to do this is to use the "jvm_start" event in the
> Professional Edition to launch the required external command at the
> appropriate time.
> This can be setup as follows:
> ---
> wrapper.event.jvm_start.command.argv.1=/usr/bin/myscript
> wrapper.event.jvm_start.command.argv.2=%WRAPPER_EVENT_JVM_PID%
> ---
> The following will help with debugging and understanding the timing of
> various events:
> ---
> wrapper.event.default.loglevel=INFO
> wrapper.event.jvm_start.command.loglevel=INFO
> ---
> Your "myscript" script would then handle the pid argument and run your
> command.
>
> See the following for details:
> http://wrapper.tanukisoftware.com/doc/english/props-event.html#command
> http://wrapper.tanukisoftware.com/doc/english/props-envvars.html
>
> Cheers,
> Leif
>
>
>
>
>
> On Mon, Sep 28, 2015 at 3:10 AM, Casey Jordan <cas...@jo...>
> wrote:
>
>> Hi Dannes,
>>
>> Thanks for the input but I have already explored options not using
>> overcommit, or turning off the OOM killer entirely and from what I can tell
>> the best thing for me to do is tell the OOM killer not to kill eXist.
>>
>> So before I evaluate other options I really need to know how to add this
>> functionality to the eXist startup.
>>
>> Thanks
>>
>>
>> On Sun, Sep 27, 2015 at 1:58 PM Dannes Wessels <da...@ex...>
>> wrote:
>>
>>> Hi,
>>>
>>> over committing memory sounds like a bad thing to do? You should make
>>> sure anyway that the JVM will not be swapped out due to memory restrictions.
>>>
>>> regards
>>>
>>> Dannes
>>>
>>>
>>> On Sun, Sep 27, 2015 at 12:32 AM, Casey Jordan <cas...@jo...>
>>> wrote:
>>>
>>>> Hi all,
>>>>
>>>> We are having an issue where the out of memory killer is killing out
>>>> process due to the out of the box overcommit memory settings on CentOS.
>>>>
>>>> After researching this quite a bit, I think the best thing to do is to
>>>> tell the OOM killer to never kill the process, as described here:
>>>> http://www.oracle.com/technetwork/articles/servers-storage-dev/oom-killer-1911807.html
>>>>
>>>> To do this, we need to execute the following command after startup:
>>>>
>>>> echo -17 > /proc/{pid}/oom_adj
>>>>
>>>>
>>>> I was thinking this could be done as part of the *.sh script that gets
>>>> executed via the java service wrapper, but I am not sure exactly how to do
>>>> this (mainly where in this script I can put the valid logic). I am hoping
>>>> someone might have done this before that could help.
>>>>
>>>> Thanks!
>>>>
>>>>
>>>> ------------------------------------------------------------------------------
>>>>
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>>>>
>>>>
>>>
>>>
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>
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