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uCosminexus Application Server Maintenance and Migration Guide

5.5.3 Output contents of Explicit heap details information

The Explicit heap information and the Explicit memory block information is output to the Explicit heap details information. When there is more than one Explicit memory block, they are output to the Explicit memory block information. You can also output the object statistical information within the Explicit memory blocks and the release rate information for the Explicit memory block to the Explicit memory block information.

The output format, output items, and output examples of Explicit heap details information are as follows:

Output format

The output format differs depending on the execution of eheapprof command.

  • When the eheapprof command is executed 

    Explicit Heap Status
--------------------
 max <EH_MAX>, total <EH_TOTAL>, used <EH_USED>, garbage <EH_GARB> (<EH_PER1> used/max, <EH_PER2> \
used/total, <EH_PER3> garbage/used), <EM_NUMS> spaces exist
 
 Explicit Memories(<EM_MGR_PTR>)
...
 "<EM_NAME>" eid=<EID>(<EM_PTR>)/<EM_TYPE>, total <EM_TOTAL>, used <EM_USED>, garbage <EM_GARB> \
(<EM_PER1> used/total, <EM_PER2> garbage/used, <FL_BLOCKS> blocks) <EM_STAT>
 deployed objects 
 ________________Size__Instances__FreeRatio__Class________________
   <ISIZE> <INUM> <FRATIO> <CNAME>
   ...
  <AISIZE> <AINUM> total
...

    Note: For details on the signs used in the output format, see 5.11.2(3) Signs used in description of output format of event log.

  • When the eheapprof command is not executed 

    Explicit Heap Status
--------------------
 max <EH_MAX>, total <EH_TOTAL>, used <EH_USED>, garbage <EH_GARB> (<EH_PER1> used/max, <EH_PER2> \
used/total, <EH_PER3> garbage/used), <EM_NUMS> spaces exist
 
 Explicit Memories(<EM_MGR_PTR>)
...
 "<EM_NAME>" eid=<EID>(<EM_PTR>)/<EM_TYPE>, total <EM_TOTAL>, used <EM_USED>, garbage <EM_GARB> \
(<EM_PER1> used/total, <EM_PER2> garbage/used, <FL_BLOCKS> blocks) <EM_STAT>
...

    Note: For details on the signs used in the output format, see 5.11.2(3) Signs used in description of output format of event log.

Output items

The following table describes about each item in output format.

Table 5‒22: Output items (Explicit heap details information)

Category

Output items

Output contents

Meaning

Explicit heap information

<EH_MAX>

<const>K

Maximum size of Explicit heap is output. The unit is kilo bytes.

<EH_TOTAL>

<const>K

Secured Explicit heap size is output. The unit is kilo bytes.

<EH_USED>

<const>K

Used Explicit heap size is output. The unit is kilo bytes.

<EH_GARB>

<const>K

The internal status of Explicit heap is output.

<EH_PER1>

<decimal>%

Explicit heap utilization rate (<EH_USED>/<EH_MAX>) is output in % sign.

<EH_PER2>

<decimal>%

Explicit heap utilization rate (<EH_USED>/<EH_TOTAL>) is output in % sign.

<EH_PER3>

<decimal>%

The internal status of Explicit heap is output.

<EM_NUMS>

<const>

The valid Explicit memory blocks are output.

<EM_MGR_PTR>

<ptr>

Memory address that has internal information for Explicit heap control is output. The memory address can be used for investigating errors.

Explicit memory block information

<EM_NAME>

<letters>

Name of Explicit memory block is output.

The output contents are uncertain when multi byte characters are included in name of Explicit memory block (Usually garbled and output).

At times "NULL" is output when name of Explicit memory block is output at about the same time of initialization of Explicit memory block or when JavaVM generates the Explicit memory block internally.

<EID>

<const>

ID of Explicit memory block is output.

<EM_PTR>

<ptr>

Memory address with Explicit memory block internal structure is output. The memory address can be used for investigating errors.

<EM_TYPE>

R|B|A

Explicit type is output. R indicates Explicit memory block used internally in Application Server. B indicates Explicit memory block used by application. A indicates the Explicit memory block that is specified using the automatic allocation configuration file.

<EM_TOTAL>

<const>K

Secured memory size of Explicit memory block is output. The unit is kilo bytes.

<EM_USED>

<const>K

Used size of Explicit memory block is output. The unit is kilo bytes.

<EM_GARB>

<const>K

Internal status of Explicit memory block is output. The unit is kilo bytes.

<EM_PER1>

<decimal>%

Explicit memory block utilization ratio (<EM_USED>/<EM_TOTAL>) is output in % sign.

<EM_PER2>

<decimal>%

Internal status of Explicit memory block is output.

<FL_BLOCKS>

<const>

Normally 0 is output

<EM_STAT>

Enable|Disable

Sub-status of Explicit memory block is output.

Object statistical information#1

<ISIZE>

<const>

Size in Explicit memory block of the object that sets the instance of a certain class is output.

<INUM>

<const>

Fixed quantity within the Explicit memory block of the object that sets the instance of certain class is displayed.

<CNAME>

<letters>

Entire class name of class indicating <ISIZE> and <INUM> is output.

<AISIZE>

<const>

Total size of all objects in Explicit memory block is output.

<AINUM>

<const>

Number of all blocks in Explicit memory block is output.

Object release rate information#2

<FRATIO>

<decimal>%

The ratio of the objects released (object release rate) in the automatic release processing of the Explicit memory block is output with the % (percentage) sign.

Object release rate =

(Number-of-class-objects-before-the-automatic-release-processing - Number-of-class-objects-after-the-automatic-release-processing)/Number-of-class-objects-before-the-automatic-release-processing ×100

Note that when the object release rate information is output, "--" is output for the Explicit memory block that was not subject to the automatic release processing.

Note:

For details on the signs used in the output contents, see 5.11.2(3) Signs used in description of output format of event log.

#1

The object statistical information is output while executing the eheapprof command. You can output actually created size, "[I" indicating the int type array greater than the quantity, in the object statistical information. In such cases, "[I" indicates objects that are not used in an Explicit memory block. Create the int type array in internal process of JavaVM for objects that are not used in the Explicit memory block.

#2

The object release rate information is output when you execute the eheapprof command specifying the -freeratio option.

Example of output

The output format differs depending on execution of the eheapprof command.

  • When eheapprof command is executed 

    Explicit Heap Status
--------------------
 max 31415926K, total 162816K, used 150528K, garbage 10004K (0.0% used/max, 91.1% used/total, 6.6% garbage/used), 3 spaces exist
 
 Explicit Memories(0x12345678)
 
 "EJBMgrData" eid=1(0x02f25610)/R, total 54272K, used 50176K, garbage 0K (91.2% used/total, 0.0% garbage/used, 0 blocks) 
 deployed objects 
 ________________Size__Instances__FreeRatio__Class________________
              35234568       10648           - java.util.HashMap
               5678900       10668           - [Ljava.util.HashMap$Entry;
               4456788        7436           - java.util.HashMap$Entry
               4321000         200           - java.util.WeakHashMap
               1234568         190           - [Ljava.util.WeakHashMap$Entry;
                454400           4           - java.util.WeakHashMap$Entry
              51380224       29146 total
 
 "VJBStored" eid=3(0x02f25910)/B, total 54272K, used 50176K, garbage 10004K (90.7% used/total, 19.9% garbage/used, 5 blocks) 
 deployed objects 
 ________________Size__Instances__FreeRatio__Class________________
              35234568        10648          49 java.util.HashMap
               5678900        10668          43 [Ljava.util.HashMap$Entry;
               4456788         7436          50 java.util.HashMap$Entry
               4321000          200          32 java.util.WeakHashMap
               1234568          190          45 [Ljava.util.WeakHashMap$Entry;
                454400            4          22 java.util.WeakHashMap$Entry
              51380224        29146 total
 
 "ExplicitMemory-2" eid=2(0x02f25700)/B, total 54272K, used 50176K, garbage 0K (91.1% used/total, 0.0% garbage/used, 0 blocks) 
 deployed objects 
 ________________Size__Instances__FreeRatio__Class________________
              35234568        10648           - java.util.HashMap
               5678900        10668           - [Ljava.util.HashMap$Entry;
               4456788         7436           - java.util.HashMap$Entry
               4321000          200           - java.util.WeakHashMap
               1234568          190           - [Ljava.util.WeakHashMap$Entry;
                454400            4           - java.util.WeakHashMap$Entry
              51380224        29146 total

  • When the eheapprof command is not executed 

    Explicit Heap Status
--------------------
 max 31415926K, total 213971K, used 205369K, garbage 1234K (1.1% used/max, 96.2% used/total, 0.0% garbage/used), 3 spaces exist
 
 Explicit Memories(0x12345678)
 
 "EJBMgrData" eid=1(0x02f25610)/R, total 154272K, used 150176K, garbage 1234K (97.0% used/total, 1.2% garbage/used, 0 blocks) Enable
 
 "VJBStored" eid=3(0x02f25910)/B, total 54272K, used 50176K, garbage 0K (90.9% used/total, 0.0% garbage/used, 2 blocks) Enable
 
 "ExplicitMemory-2" eid=2(0x02f25700)/R, total 5427K, used 5017K, garbage 0K (92.1% used/total, 0.0% garbage/used, 0 blocks) Enable

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