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From Siddhant Goel <siddhantg...@gmail.com>
Subject jmap output help
Date Sun, 28 Mar 2010 06:01:04 GMT
Hi everyone,

The output of "jmap -histo:live 27959 | head -30" is something like the
following :

num     #instances         #bytes  class name
----------------------------------------------
   1:        448441      180299464  [C
   2:          5311      135734480  [I
   3:          3623       68389720  [B
   4:        445669       17826760  java.lang.String
   5:        391739       15669560  org.apache.lucene.index.TermInfo
   6:        417442       13358144  org.apache.lucene.index.Term
   7:         58767        5171496
 org.apache.lucene.index.FieldsReader$LazyField
   8:         32902        5049760  <constMethodKlass>
   9:         32902        3955920  <methodKlass>
  10:          2843        3512688  <constantPoolKlass>
  11:          2397        3128048  [Lorg.apache.lucene.index.Term;
  12:            35        3053592  [J
  13:             3        3044288  [Lorg.apache.lucene.index.TermInfo;
  14:         55671        2707536  <symbolKlass>
  15:         27282        2701352  [Ljava.lang.Object;
  16:          2843        2212384  <instanceKlassKlass>
  17:          2343        2132224  <constantPoolCacheKlass>
  18:         26424        1056960  java.util.ArrayList
  19:         16423        1051072  java.util.LinkedHashMap$Entry
  20:          2039        1028944  <methodDataKlass>
  21:         14336         917504  org.apache.lucene.document.Field
  22:         29587         710088  java.lang.Integer
  23:          3171         583464  java.lang.Class
  24:           813         492880  [Ljava.util.HashMap$Entry;
  25:          8471         474376  org.apache.lucene.search.PhraseQuery
  26:          4184         402848  [[I
  27:          4277         380704  [S

Is it ok to assume that the top 3 entries (character/integer/byte arrays)
are referring to the entries inside the solr cache?

Thanks,


-- 
- Siddhant

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