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I need some help how to setup my jvm.

My AWS Linux CentOS 64 / 1 Core / 1GB RAM / WildFly 10 and a simple war with JAVA/EJB/JPA. and java 1.8.0_121

When I deploy the war file, it takes about some time and WildFly shutdowns.

Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2952]  1001  2952   665416   106289     289        0             0 java
Mar 24 14:40:04 ip-172-31-8-83 kernel: Out of memory: Kill process 2952 (java) score 420 or sacrifice child
Mar 24 14:40:04 ip-172-31-8-83 kernel: Killed process 2952 (java) total-vm:2661664kB, anon-rss:425156kB, file-rss:0kB, shmem-rss:0kB

In Standalone.conf I have :

JAVA_OPTS="-Xms64m -Xmx512m -XX:MetaspaceSize=96M -XX:MaxMetaspaceSize=256m -Xss256k  -Djava.net.preferIPv4Stack=true -Duser.timezone=America/Sao_Paulo"

I need to setup the right values for the 1GB RAM AWS Instance.

Thanks in advance !

Snapshot: 

Mar 24 14:40:04 ip-172-31-8-83 kernel: [ pid ]   uid  tgid total_vm      rss nr_ptes swapents oom_score_adj name
Mar 24 14:40:04 ip-172-31-8-83 kernel: [  323]     0   323     8840      356      18        0             0 systemd-journal
Mar 24 14:40:04 ip-172-31-8-83 kernel: [  357]     0   357    11645      536      22        0         -1000 systemd-udevd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [  392]     0   392    13854      112      26        0         -1000 auditd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [  451]    81   451     8176      138      17        0          -900 dbus-daemon
Mar 24 14:40:04 ip-172-31-8-83 kernel: [  455]     0   455   127319      539      63        0             0 NetworkManager
Mar 24 14:40:04 ip-172-31-8-83 kernel: [  456]     0   456     6048       73      15        0             0 systemd-logind
Mar 24 14:40:04 ip-172-31-8-83 kernel: [  458]   998   458   131878     1609      54        0             0 polkitd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [  460]   997   460    28962      103      26        0             0 chronyd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [  467]     0   467    31556      156      21        0             0 crond
Mar 24 14:40:04 ip-172-31-8-83 kernel: [  474]     0   474    27509       32      13        0             0 agetty
Mar 24 14:40:04 ip-172-31-8-83 kernel: [  482]     0   482    27509       30      10        0             0 agetty
Mar 24 14:40:04 ip-172-31-8-83 kernel: [  499]     0   499    28219     3124      54        0             0 dhclient
Mar 24 14:40:04 ip-172-31-8-83 kernel: [  733]     0   733   138288     2664      88        0             0 tuned
Mar 24 14:40:04 ip-172-31-8-83 kernel: [  736]     0   736    56068      482      37        0             0 rsyslogd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 1670]     0  1670    22472      281      42        0             0 master
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 1699]    89  1699    22515      276      45        0             0 qmgr
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2077]     0  2077    20631      217      39        0         -1000 sshd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2130]    27  2130   280031    53066     167        0             0 mysqld
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2333]     0  2333    26971       24       7        0             0 rhnsd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2397]     0  2397    35749      320      72        0             0 sshd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2400]  1000  2400    35787      348      70        0             0 sshd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2401]  1000  2401    13225      190      29        0             0 sftp-server
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2410]     0  2410    35749      319      72        0             0 sshd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2413]  1000  2413    35770      331      69        0             0 sshd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2414]  1000  2414    28846       94      14        0             0 bash
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2433]     0  2433    48346      173      49        0             0 sudo
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2434]     0  2434    46918      152      48        0             0 su
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2435]     0  2435    28878      123      14        0             0 bash
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2533]     0  2533    94123     1575     180        0             0 httpd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2534]    48  2534    98410     5599     184        0             0 httpd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2535]    48  2535    97125     4817     181        0             0 httpd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2538]    48  2538    97641     4819     182        0             0 httpd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2888]  1001  2888    28281       52      14        0             0 standalone.sh
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 2952]  1001  2952   665416   106289     289        0             0 java
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 3088]    48  3088    97260     5185     182        0             0 httpd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 3115]    48  3115    98612     5715     185        0             0 httpd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 3169]    89  3169    22498      273      43        0             0 pickup
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 3230]    48  3230    98419     5602     185        0             0 httpd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 3231]    48  3231    95656     3494     179        0             0 httpd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 3232]    48  3232    97320     5048     182        0             0 httpd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 3233]    48  3233    94517     2289     176        0             0 httpd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 3235]    48  3235    96425     4303     181        0             0 httpd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 3246]    48  3246    94157     1567     175        0             0 httpd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 3248]     0  3248    94123     1584     170        0             0 httpd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 3249]     0  3249    94123     1594     170        0             0 httpd
Mar 24 14:40:04 ip-172-31-8-83 kernel: [ 3250]     0  3250    94123     1596     170        0             0 httpd
trincot
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Al2x
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  • You should show more logs. We don't even see the 2 hours delay in the log. – davidxxx Mar 24 '17 at 17:58
  • The two hours is random. sometimes it happens in minutes. – Al2x Mar 24 '17 at 18:01
  • What version of Java are you using? – stdunbar Mar 24 '17 at 18:42
  • Java version 1.8.0_121 – Al2x Mar 24 '17 at 19:01
  • You are running out of memory, your choices are: reduce de memory used by wildfly (Eg `-Xmx256m`, it depends how much memory your application needs), change to a better instance type or add swap to the instance http://stackoverflow.com/questions/17173972/how-do-you-add-swap-to-an-ec2-instance. – Federico Sierra Mar 24 '17 at 19:52
  • I've reduced a lot of times with different values but this one was applied with success !! It works. JAVA_OPTS="-Xms32m -Xmx128m -XX:MetaspaceSize=46M -XX:MaxMetaspaceSize=128m -Xss256k – Al2x Mar 25 '17 at 09:56
  • Do you think @Frederico Sierra these settings I posted it will support a (war application) with some features like access DB, some web forms with queries..etc... ? – Al2x Mar 25 '17 at 10:15

1 Answers1

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Its not the best approach but it worked fine to me on my test environment.

I created a swap file as told by Frederico Sierra on this post.

Add Swap File to CentOS 6

Al2x
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