You are viewing a plain text version of this content. The canonical link for it is here.
Posted to solr-user@lucene.apache.org by Denis Kuzmenok <fo...@ukr.net> on 2011/05/31 22:18:29 UTC
Solr memory consumption
I run multiple-core solr with flags: -Xms3g -Xmx6g -D64, but i see
this in top after 6-8 hours and still raising:
17485 test 21 4 10.0g 7.4g 9760 S 308.2 31.3 448:00.75 java
-Xms3g -Xmx6g -D64 -Dsolr.solr.home=/home/test/solr/example/multicore/ -jar start.jar
Are there any ways to limit memory for sure?
Thanks
Re: Solr memory consumption
Posted by Denis Kuzmenok <fo...@ukr.net>.
My OS is also CentOS (5.4). If it were 10gb all the time it would be
ok, but it grows for 13-15gb, and hurts other services =\
> It could be environment specific (specific of your "top" command
> implementation, OS, etc)
> I have on CentOS 2986m "virtual" memory showing although -Xmx2g
> You have 10g "virtual" although -Xmx6g
> Don't trust it too much... "top" command may count OS buffers for opened
> files, network sockets, JVM DLLs itself, etc (which is outside Java GC
> responsibility); additionally to JVM memory... it counts all memory, not
> sure... if you don't have big values for 99.9%wa (which means WAIT I/O -
> disk swap usage) everyhing is fine...
> -----Original Message-----
> From: Denis Kuzmenok
> Sent: May-31-11 4:18 PM
> To: solr-user@lucene.apache.org
> Subject: Solr memory consumption
> I run multiple-core solr with flags: -Xms3g -Xmx6g -D64, but i see this
> in top after 6-8 hours and still raising:
> 17485 test 21 4 10.0g 7.4g 9760 S 308.2 31.3 448:00.75 java
> -Xms3g -Xmx6g -D64
> -Dsolr.solr.home=/home/test/solr/example/multicore/ -jar
> start.jar
>
> Are there any ways to limit memory for sure?
> Thanks
RE: Solr memory consumption
Posted by Fuad Efendi <fu...@efendi.ca>.
It could be environment specific (specific of your "top" command
implementation, OS, etc)
I have on CentOS 2986m "virtual" memory showing although -Xmx2g
You have 10g "virtual" although -Xmx6g
Don't trust it too much... "top" command may count OS buffers for opened
files, network sockets, JVM DLLs itself, etc (which is outside Java GC
responsibility); additionally to JVM memory... it counts all memory, not
sure... if you don't have big values for 99.9%wa (which means WAIT I/O -
disk swap usage) everyhing is fine...
-----Original Message-----
From: Denis Kuzmenok
Sent: May-31-11 4:18 PM
To: solr-user@lucene.apache.org
Subject: Solr memory consumption
I run multiple-core solr with flags: -Xms3g -Xmx6g -D64, but i see this
in top after 6-8 hours and still raising:
17485 test 21 4 10.0g 7.4g 9760 S 308.2 31.3 448:00.75 java
-Xms3g -Xmx6g -D64 -Dsolr.solr.home=/home/test/solr/example/multicore/ -jar
start.jar
Are there any ways to limit memory for sure?
Thanks
Re: Solr memory consumption
Posted by Markus Jelsma <ma...@openindex.io>.
PermSize and MaxPermSize don't need to be higher than 64M. You should read on
JVM tuning. The permanent generation is only used for the code that's being
executed.
> So what should i do to evoid that error?
> I can use 10G on server, now i try to run with flags:
> java -Xms6G -Xmx6G -XX:MaxPermSize=1G -XX:PermSize=512M -D64
>
> Or should i set xmx to lower numbers and what about other params?
> Sorry, i don't know much about java/jvm =(
>
> Wednesday, June 1, 2011, 7:29:50 PM, you wrote:
> > Are you in fact out of swap space, as the java error suggested?
> >
> > The way JVM's work always, if you tell it -Xmx6g, it WILL use all 6g
> > eventually. The JVM doesn't Garbage Collect until it's going to run out
> > of heap space, until it gets to your Xmx. It will keep using RAM until
> > it reaches your Xmx.
> >
> > If your Xmx is set so high you don't have enough RAM available, that
> > will be a problem, you don't want to set Xmx like this. Ideally you
> > don't even want to swap, but normally the OS will swap to give you
> > enough RAM if neccesary -- if you don't have swap space for it to do
> > that, to give the JVM the 6g you've configured it to take.... well, that
> > seems to be what the Java error message is telling you. Of course
> > sometimes error messages are misleading.
> >
> > But yes, if you set Xmx to 6G, the process WILL use all 6G eventually.
> > This is just how the JVM works.
Re: Solr memory consumption
Posted by Dennis Schafroth <de...@indexdata.com>.
I ran out of memory on some big indexes when using solr 1.4. Found out that increasing
termInfosIndexDivisor
in solrconfig.xml could help a lot.
It may slow down your searching your index.
cheers,
:-Dennis
On 02/06/2011, at 01.16, Alexey Serba wrote:
> Hey Denis,
>
> * How big is your index in terms of number of documents and index size?
> * Is it production system where you have many search requests?
> * Is there any pattern for OOM errors? I.e. right after you start your
> Solr app, after some search activity or specific Solr queries, etc?
> * What are 1) cache settings 2) facets and sort-by fields 3) commit
> frequency and warmup queries?
> etc
>
> Generally you might want to connect to your jvm using jconsole tool
> and monitor your heap usage (and other JVM/Solr numbers)
>
> * http://java.sun.com/developer/technicalArticles/J2SE/jconsole.html
> * http://wiki.apache.org/solr/SolrJmx#Remote_Connection_to_Solr_JMX
>
> HTH,
> Alexey
>
> 2011/6/1 Denis Kuzmenok <fo...@ukr.net>:
>> There were no parameters at all, and java hitted "out of memory"
>> almost every day, then i tried to add parameters but nothing changed.
>> Xms/Xmx - did not solve the problem too. Now i try the MaxPermSize,
>> because it's the last thing i didn't try yet :(
>>
>>
>> Wednesday, June 1, 2011, 9:00:56 PM, you wrote:
>>
>>> Could be related to your crazy high MaxPermSize like Marcus said.
>>
>>> I'm no JVM tuning expert either. Few people are, it's confusing. So if
>>> you don't understand it either, why are you trying to throw in very
>>> non-standard parameters you don't understand? Just start with whatever
>>> the Solr example jetty has, and only change things if you have a reason
>>> to (that you understand).
>>
>>> On 6/1/2011 1:19 PM, Denis Kuzmenok wrote:
>>>> Overall memory on server is 24G, and 24G of swap, mostly all the time
>>>> swap is free and is not used at all, that's why "no free swap" sound
>>>> strange to me..
>>
>>
>>
>>
>>
>
Re: Solr memory consumption
Posted by Alexey Serba <as...@gmail.com>.
> Commits are divided into 2 groups:
> - often but small (last changed
> info)
1) Make sure that it's not too often and you don't have commit
overlapping problem.
http://wiki.apache.org/solr/FAQ#What_does_.22PERFORMANCE_WARNING:_Overlapping_onDeckSearchers.3DX.22_mean_in_my_logs.3F
2) You may also try to limit cache sizes and check if it helps.
3) If it doesn't help then try to monitor your app using jconsole
* try to hit garbage collector and see if it frees some memory
* browse solr jmx attributes and see if there'r any hints re solr
caches usage, etc
4) Try to run jmap -heap -histo and see if there's any hints there
5) If none of above helps then you probably need to examine your
memory usage using some kind of java profiler tool (like yourkit
profiler)
> Size: 4 databases about 1G (sum), 1 database (with n-gram) for 21G..
> I don't know any other way to search for product names except n-gram
> =\
Standard text field with solr.WordDelimiterFilterFactory and
generateWordParts="1" generateNumberParts="1" catenateWords="1"
catenateNumbers="1" catenateAll="1" splitOnCaseChange="1" during
indexing isn't good enough? You might want to limit min and max ngram
size, just to reduce your index size.
Re: Solr memory consumption
Posted by Denis Kuzmenok <fo...@ukr.net>.
> Hey Denis,
> * How big is your index in terms of number of documents and index size?
5 cores, average 250.000 documents, one with about 1 million (but
without text, just int/float fields), one with about 10 million
id/name documents, but with n-gram.
Size: 4 databases about 1G (sum), 1 database (with n-gram) for 21G..
I don't know any other way to search for product names except n-gram
=\
> * Is it production system where you have many search requests?
Yes, dependent on database, but not less than 100 req/sec
> * Is there any pattern for OOM errors? I.e. right after you start your
> Solr app, after some search activity or specific Solr queries, etc?
No, java just raises memory size used all the time until it crush.
> * What are 1) cache settings 2) facets and sort-by fields 3) commit
> frequency and warmup queries?
All settings are default (as given in trunk / example).
Facets are used, sort by also used.
Commits are divided into 2 groups:
- often but small (last changed
info)
- 1 time per day all the database
> etc
> Generally you might want to connect to your jvm using jconsole tool
> and monitor your heap usage (and other JVM/Solr numbers)
> * http://java.sun.com/developer/technicalArticles/J2SE/jconsole.html
> * http://wiki.apache.org/solr/SolrJmx#Remote_Connection_to_Solr_JMX
> HTH,
> Alexey
Re: Solr memory consumption
Posted by Alexey Serba <as...@gmail.com>.
Hey Denis,
* How big is your index in terms of number of documents and index size?
* Is it production system where you have many search requests?
* Is there any pattern for OOM errors? I.e. right after you start your
Solr app, after some search activity or specific Solr queries, etc?
* What are 1) cache settings 2) facets and sort-by fields 3) commit
frequency and warmup queries?
etc
Generally you might want to connect to your jvm using jconsole tool
and monitor your heap usage (and other JVM/Solr numbers)
* http://java.sun.com/developer/technicalArticles/J2SE/jconsole.html
* http://wiki.apache.org/solr/SolrJmx#Remote_Connection_to_Solr_JMX
HTH,
Alexey
2011/6/1 Denis Kuzmenok <fo...@ukr.net>:
> There were no parameters at all, and java hitted "out of memory"
> almost every day, then i tried to add parameters but nothing changed.
> Xms/Xmx - did not solve the problem too. Now i try the MaxPermSize,
> because it's the last thing i didn't try yet :(
>
>
> Wednesday, June 1, 2011, 9:00:56 PM, you wrote:
>
>> Could be related to your crazy high MaxPermSize like Marcus said.
>
>> I'm no JVM tuning expert either. Few people are, it's confusing. So if
>> you don't understand it either, why are you trying to throw in very
>> non-standard parameters you don't understand? Just start with whatever
>> the Solr example jetty has, and only change things if you have a reason
>> to (that you understand).
>
>> On 6/1/2011 1:19 PM, Denis Kuzmenok wrote:
>>> Overall memory on server is 24G, and 24G of swap, mostly all the time
>>> swap is free and is not used at all, that's why "no free swap" sound
>>> strange to me..
>
>
>
>
>
Re: Solr memory consumption
Posted by Denis Kuzmenok <fo...@ukr.net>.
There were no parameters at all, and java hitted "out of memory"
almost every day, then i tried to add parameters but nothing changed.
Xms/Xmx - did not solve the problem too. Now i try the MaxPermSize,
because it's the last thing i didn't try yet :(
Wednesday, June 1, 2011, 9:00:56 PM, you wrote:
> Could be related to your crazy high MaxPermSize like Marcus said.
> I'm no JVM tuning expert either. Few people are, it's confusing. So if
> you don't understand it either, why are you trying to throw in very
> non-standard parameters you don't understand? Just start with whatever
> the Solr example jetty has, and only change things if you have a reason
> to (that you understand).
> On 6/1/2011 1:19 PM, Denis Kuzmenok wrote:
>> Overall memory on server is 24G, and 24G of swap, mostly all the time
>> swap is free and is not used at all, that's why "no free swap" sound
>> strange to me..
Re: Solr memory consumption
Posted by Jonathan Rochkind <ro...@jhu.edu>.
Could be related to your crazy high MaxPermSize like Marcus said.
I'm no JVM tuning expert either. Few people are, it's confusing. So if
you don't understand it either, why are you trying to throw in very
non-standard parameters you don't understand? Just start with whatever
the Solr example jetty has, and only change things if you have a reason
to (that you understand).
On 6/1/2011 1:19 PM, Denis Kuzmenok wrote:
> Overall memory on server is 24G, and 24G of swap, mostly all the time
> swap is free and is not used at all, that's why "no free swap" sound
> strange to me..
>
>
>> There is no simple answer.
>> All I can say is you don't usually want to use an Xmx that's more than
>> you actually have available RAM, and _can't_ use more than you have
>> available ram+swap, and the Java error seems to be suggesting you are
>> using more than is available in ram+swap. That may not be what's going
>> on, JVM memory issues are indeed confusing.
>> Why don't you start smaller, and see what happens. But if you end up
>> needing more RAM for your Solr than you have available on the server,
>> then you're just going to need more RAM.
>> You may have to learn something about java/jvm to do memory tuning for
>> Solr. Or, just start with the default parameters from the Solr example
>> jetty, and if you don't run into any problems, then great. Starting
>> with the example jetty shipped with Solr would be the easiest way to get
>> started for someone who doesn't know much about Java/JVM.
>> On 6/1/2011 12:37 PM, Denis Kuzmenok wrote:
>>> So what should i do to evoid that error?
>>> I can use 10G on server, now i try to run with flags:
>>> java -Xms6G -Xmx6G -XX:MaxPermSize=1G -XX:PermSize=512M -D64
>>>
>>> Or should i set xmx to lower numbers and what about other params?
>>> Sorry, i don't know much about java/jvm =(
>>>
>>>
>>>
>>> Wednesday, June 1, 2011, 7:29:50 PM, you wrote:
>>>
>>>> Are you in fact out of swap space, as the java error suggested?
>>>> The way JVM's work always, if you tell it -Xmx6g, it WILL use all 6g
>>>> eventually. The JVM doesn't Garbage Collect until it's going to run out
>>>> of heap space, until it gets to your Xmx. It will keep using RAM until
>>>> it reaches your Xmx.
>>>> If your Xmx is set so high you don't have enough RAM available, that
>>>> will be a problem, you don't want to set Xmx like this. Ideally you
>>>> don't even want to swap, but normally the OS will swap to give you
>>>> enough RAM if neccesary -- if you don't have swap space for it to do
>>>> that, to give the JVM the 6g you've configured it to take.... well, that
>>>> seems to be what the Java error message is telling you. Of course
>>>> sometimes error messages are misleading.
>>>> But yes, if you set Xmx to 6G, the process WILL use all 6G eventually.
>>>> This is just how the JVM works.
>>>
>
>
>
Re: Solr memory consumption
Posted by Denis Kuzmenok <fo...@ukr.net>.
Overall memory on server is 24G, and 24G of swap, mostly all the time
swap is free and is not used at all, that's why "no free swap" sound
strange to me..
> There is no simple answer.
> All I can say is you don't usually want to use an Xmx that's more than
> you actually have available RAM, and _can't_ use more than you have
> available ram+swap, and the Java error seems to be suggesting you are
> using more than is available in ram+swap. That may not be what's going
> on, JVM memory issues are indeed confusing.
> Why don't you start smaller, and see what happens. But if you end up
> needing more RAM for your Solr than you have available on the server,
> then you're just going to need more RAM.
> You may have to learn something about java/jvm to do memory tuning for
> Solr. Or, just start with the default parameters from the Solr example
> jetty, and if you don't run into any problems, then great. Starting
> with the example jetty shipped with Solr would be the easiest way to get
> started for someone who doesn't know much about Java/JVM.
> On 6/1/2011 12:37 PM, Denis Kuzmenok wrote:
>> So what should i do to evoid that error?
>> I can use 10G on server, now i try to run with flags:
>> java -Xms6G -Xmx6G -XX:MaxPermSize=1G -XX:PermSize=512M -D64
>>
>> Or should i set xmx to lower numbers and what about other params?
>> Sorry, i don't know much about java/jvm =(
>>
>>
>>
>> Wednesday, June 1, 2011, 7:29:50 PM, you wrote:
>>
>>> Are you in fact out of swap space, as the java error suggested?
>>> The way JVM's work always, if you tell it -Xmx6g, it WILL use all 6g
>>> eventually. The JVM doesn't Garbage Collect until it's going to run out
>>> of heap space, until it gets to your Xmx. It will keep using RAM until
>>> it reaches your Xmx.
>>> If your Xmx is set so high you don't have enough RAM available, that
>>> will be a problem, you don't want to set Xmx like this. Ideally you
>>> don't even want to swap, but normally the OS will swap to give you
>>> enough RAM if neccesary -- if you don't have swap space for it to do
>>> that, to give the JVM the 6g you've configured it to take.... well, that
>>> seems to be what the Java error message is telling you. Of course
>>> sometimes error messages are misleading.
>>> But yes, if you set Xmx to 6G, the process WILL use all 6G eventually.
>>> This is just how the JVM works.
>>
>>
Re: Solr memory consumption
Posted by Jonathan Rochkind <ro...@jhu.edu>.
There is no simple answer.
All I can say is you don't usually want to use an Xmx that's more than
you actually have available RAM, and _can't_ use more than you have
available ram+swap, and the Java error seems to be suggesting you are
using more than is available in ram+swap. That may not be what's going
on, JVM memory issues are indeed confusing.
Why don't you start smaller, and see what happens. But if you end up
needing more RAM for your Solr than you have available on the server,
then you're just going to need more RAM.
You may have to learn something about java/jvm to do memory tuning for
Solr. Or, just start with the default parameters from the Solr example
jetty, and if you don't run into any problems, then great. Starting
with the example jetty shipped with Solr would be the easiest way to get
started for someone who doesn't know much about Java/JVM.
On 6/1/2011 12:37 PM, Denis Kuzmenok wrote:
> So what should i do to evoid that error?
> I can use 10G on server, now i try to run with flags:
> java -Xms6G -Xmx6G -XX:MaxPermSize=1G -XX:PermSize=512M -D64
>
> Or should i set xmx to lower numbers and what about other params?
> Sorry, i don't know much about java/jvm =(
>
>
>
> Wednesday, June 1, 2011, 7:29:50 PM, you wrote:
>
>> Are you in fact out of swap space, as the java error suggested?
>> The way JVM's work always, if you tell it -Xmx6g, it WILL use all 6g
>> eventually. The JVM doesn't Garbage Collect until it's going to run out
>> of heap space, until it gets to your Xmx. It will keep using RAM until
>> it reaches your Xmx.
>> If your Xmx is set so high you don't have enough RAM available, that
>> will be a problem, you don't want to set Xmx like this. Ideally you
>> don't even want to swap, but normally the OS will swap to give you
>> enough RAM if neccesary -- if you don't have swap space for it to do
>> that, to give the JVM the 6g you've configured it to take.... well, that
>> seems to be what the Java error message is telling you. Of course
>> sometimes error messages are misleading.
>> But yes, if you set Xmx to 6G, the process WILL use all 6G eventually.
>> This is just how the JVM works.
>
>
Re: Solr memory consumption
Posted by Denis Kuzmenok <fo...@ukr.net>.
So what should i do to evoid that error?
I can use 10G on server, now i try to run with flags:
java -Xms6G -Xmx6G -XX:MaxPermSize=1G -XX:PermSize=512M -D64
Or should i set xmx to lower numbers and what about other params?
Sorry, i don't know much about java/jvm =(
Wednesday, June 1, 2011, 7:29:50 PM, you wrote:
> Are you in fact out of swap space, as the java error suggested?
> The way JVM's work always, if you tell it -Xmx6g, it WILL use all 6g
> eventually. The JVM doesn't Garbage Collect until it's going to run out
> of heap space, until it gets to your Xmx. It will keep using RAM until
> it reaches your Xmx.
> If your Xmx is set so high you don't have enough RAM available, that
> will be a problem, you don't want to set Xmx like this. Ideally you
> don't even want to swap, but normally the OS will swap to give you
> enough RAM if neccesary -- if you don't have swap space for it to do
> that, to give the JVM the 6g you've configured it to take.... well, that
> seems to be what the Java error message is telling you. Of course
> sometimes error messages are misleading.
> But yes, if you set Xmx to 6G, the process WILL use all 6G eventually.
> This is just how the JVM works.
Re: Solr memory consumption
Posted by Jonathan Rochkind <ro...@jhu.edu>.
Are you in fact out of swap space, as the java error suggested?
The way JVM's work always, if you tell it -Xmx6g, it WILL use all 6g
eventually. The JVM doesn't Garbage Collect until it's going to run out
of heap space, until it gets to your Xmx. It will keep using RAM until
it reaches your Xmx.
If your Xmx is set so high you don't have enough RAM available, that
will be a problem, you don't want to set Xmx like this. Ideally you
don't even want to swap, but normally the OS will swap to give you
enough RAM if neccesary -- if you don't have swap space for it to do
that, to give the JVM the 6g you've configured it to take.... well, that
seems to be what the Java error message is telling you. Of course
sometimes error messages are misleading.
But yes, if you set Xmx to 6G, the process WILL use all 6G eventually.
This is just how the JVM works.
On 6/1/2011 12:15 PM, Denis Kuzmenok wrote:
> Here is output after about 24 hours running solr. Maybe there is some
> way to limit memory consumption? :(
>
>
> test@d6 ~/solr/example $ java -Xms3g -Xmx6g -D64
> -Dsolr.solr.home=/home/test/solr/example/multicore/ -jar start.jar
> 2011-05-31 17:05:14.265:INFO::Logging to STDERR via org.mortbay.log.StdErrLog
> 2011-05-31 17:05:14.355:INFO::jetty-6.1-SNAPSHOT
> 2011-05-31 17:05:16.447:INFO::Started SocketConnector@0.0.0.0:4900
> #
> # A fatal error has been detected by the Java Runtime Environment:
> #
> # java.lang.OutOfMemoryError: requested 32744 bytes for ChunkPool::allocate. Out of swap space?
> #
> # Internal Error (allocation.cpp:117), pid=17485, tid=1090320704
> # Error: ChunkPool::allocate
> #
> # JRE version: 6.0_17-b17
> # Java VM: OpenJDK 64-Bit Server VM (14.0-b16 mixed mode linux-amd64 )
> # Derivative: IcedTea6 1.7.5
> # Distribution: Custom build (Wed Oct 13 13:04:40 EDT 2010)
> # An error report file with more information is saved as:
> # /mnt/data/solr/example/hs_err_pid17485.log
> #
> # If you would like to submit a bug report, please include
> # instructions how to reproduce the bug and visit:
> # http://icedtea.classpath.org/bugzilla
> #
> Aborted
>
>
>> I run multiple-core solr with flags: -Xms3g -Xmx6g -D64, but i see
>> this in top after 6-8 hours and still raising:
>> 17485 test 21 4 10.0g 7.4g 9760 S 308.2 31.3 448:00.75 java
>> -Xms3g -Xmx6g -D64
>> -Dsolr.solr.home=/home/test/solr/example/multicore/ -jar start.jar
>>
>> Are there any ways to limit memory for sure?
>> Thanks
>
>
>
>
Re: Solr memory consumption
Posted by Denis Kuzmenok <fo...@ukr.net>.
Here is output after about 24 hours running solr. Maybe there is some
way to limit memory consumption? :(
test@d6 ~/solr/example $ java -Xms3g -Xmx6g -D64
-Dsolr.solr.home=/home/test/solr/example/multicore/ -jar start.jar
2011-05-31 17:05:14.265:INFO::Logging to STDERR via org.mortbay.log.StdErrLog
2011-05-31 17:05:14.355:INFO::jetty-6.1-SNAPSHOT
2011-05-31 17:05:16.447:INFO::Started SocketConnector@0.0.0.0:4900
#
# A fatal error has been detected by the Java Runtime Environment:
#
# java.lang.OutOfMemoryError: requested 32744 bytes for ChunkPool::allocate. Out of swap space?
#
# Internal Error (allocation.cpp:117), pid=17485, tid=1090320704
# Error: ChunkPool::allocate
#
# JRE version: 6.0_17-b17
# Java VM: OpenJDK 64-Bit Server VM (14.0-b16 mixed mode linux-amd64 )
# Derivative: IcedTea6 1.7.5
# Distribution: Custom build (Wed Oct 13 13:04:40 EDT 2010)
# An error report file with more information is saved as:
# /mnt/data/solr/example/hs_err_pid17485.log
#
# If you would like to submit a bug report, please include
# instructions how to reproduce the bug and visit:
# http://icedtea.classpath.org/bugzilla
#
Aborted
> I run multiple-core solr with flags: -Xms3g -Xmx6g -D64, but i see
> this in top after 6-8 hours and still raising:
> 17485 test 21 4 10.0g 7.4g 9760 S 308.2 31.3 448:00.75 java
> -Xms3g -Xmx6g -D64
> -Dsolr.solr.home=/home/test/solr/example/multicore/ -jar start.jar
>
> Are there any ways to limit memory for sure?
> Thanks