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  1. JBoss Enterprise Application Platform
  2. JBEAP-16625

(7.2.z) Increased memory footprint after Netty upgrade

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      1. activate native memory tracking by adding "-XX:NativeMemoryTracking=summary" to JAVA_OPTS in standalone.conf
      2. start the server with the standalone-full configuration
      3 run: jcmd $PID VM.native_memory summary scale=MB

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      1. activate native memory tracking by adding "-XX:NativeMemoryTracking=summary" to JAVA_OPTS in standalone.conf 2. start the server with the standalone-full configuration 3 run: jcmd $PID VM.native_memory summary scale=MB

    Description

      There is a huge increase in memory footprint after upgrading Netty to 4.1.28.Final

      Comparing the jcmd output of 7.2.0 vs 7.2.1.CR1:
      7.2.0.GA

      Native Memory Tracking:

Total: reserved=2864MB, committed=1615MB
-                 Java Heap (reserved=1304MB, committed=1304MB)
                            (mmap: reserved=1304MB, committed=1304MB) 
 
-                     Class (reserved=1089MB, committed=73MB)
                            (classes #10511)
                            (malloc=11MB #17585) 
                            (mmap: reserved=1078MB, committed=62MB) 
 
-                    Thread (reserved=137MB, committed=137MB)
                            (thread #136)
                            (stack: reserved=136MB, committed=136MB)
 
-                      Code (reserved=246MB, committed=13MB)
                            (malloc=2MB #3925) 
                            (mmap: reserved=244MB, committed=11MB) 
 
-                        GC (reserved=58MB, committed=58MB)
                            (malloc=10MB #406) 
                            (mmap: reserved=48MB, committed=48MB) 
 
-                  Internal (reserved=13MB, committed=13MB)
                            (malloc=13MB #15553) 
 
-                    Symbol (reserved=14MB, committed=14MB)
                            (malloc=12MB #123950) 
                            (arena=2MB #1)

      7.2.1.CR1

      Native Memory Tracking:

Total: reserved=3633MB, committed=2388MB
-                 Java Heap (reserved=1304MB, committed=1304MB)
                            (mmap: reserved=1304MB, committed=1304MB) 
 
-                     Class (reserved=1101MB, committed=87MB)
                            (classes #12817)
                            (malloc=11MB #20202) 
                            (mmap: reserved=1090MB, committed=76MB) 
 
-                    Thread (reserved=117MB, committed=117MB)
                            (thread #116)
                            (stack: reserved=116MB, committed=116MB)
 
-                      Code (reserved=246MB, committed=16MB)
                            (malloc=3MB #4532) 
                            (mmap: reserved=244MB, committed=13MB) 
 
-                        GC (reserved=58MB, committed=58MB)
                            (malloc=10MB #432) 
                            (mmap: reserved=48MB, committed=48MB) 
 
-                  Internal (reserved=785MB, committed=785MB)
                            (malloc=785MB #67601) 
 
-                    Symbol (reserved=17MB, committed=17MB)
                            (malloc=15MB #161714) 
                            (arena=2MB #1)

      Internal memory increases from 13MB to 785MB.
      Replacing netty with the version from EAP 7.2.0 (4.1.25) brings the internal memory back to 7.2.0 levels.

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          is blocked by

          Bug - A problem that impairs or prevents the functions of the product. ENTMQBR-2387 Increased memory footprint after Netty upgrade (AMQ 7.2.1 -> 7.2.2)

          • Blocker - To be worked above all other priorities. This term is chosen when the severity of the issue is very high, has no workaround, or the effort for the change is comparatively low. Issues that may be very publicly visible and could generate significant media attention may also drive a higher priority.
          • Closed
          relates to

          Bug - A problem that impairs or prevents the functions of the product. ENTMQBR-2292 High Per-Thread Memory Usage by Netty / XNIO

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Closed

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              rhn-support-jbertram Justin Bertram
              pmackay@redhat.com Peter Mackay
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                Updated:
                Resolved: