详细信息如下：

Sun Oct 16 04:31:31 2011
Errors in file /u01/app/oracle/admin/db1/udump/db1_ora_6459722.trc:
ORA-00600: internal error code, arguments: [729], [360], [space leak], [], [], [], [], []

这个ORA-600的三个参数的含义分别为：729是错误的编号，729的错误和内存泄漏相关；360是内存泄漏的字节数；space leak：对于729错误，第三个参数永远是space leak，表明这是一个内存泄漏的问题。

正常情况下，Oracle的进程会自动管理当前进程内存的分配和释放，只有当进程结束的时候，Oracle会接管进程的内存，将其全部释放。在Oracle释放进程的内存时，会检查每个内存chunk的状态，正常情况下所有的状态都是free和permanent，如果出现了其他状态，比如FREEABLE或者RECREATABLE等，说明进程没有及时的释放一些内存chunk，这就是所谓的内存泄漏。

详细的TRACE如下：

*** 2011-10-16 04:31:31.115
*** SERVICE NAME:(SYS$USERS) 2011-10-16 04:31:31.114
*** SESSION ID:(6191.1172) 2011-10-16 04:31:31.114
******** ERROR: UGA memory leak detected 360 ********
******************************************************
HEAP DUMP heap name="session heap"  desc=1104473d8
 extent sz=0xff80 alt=32767 het=32767 rec=0 flg=2 pc=3
 parent=110198a30 wner=7000013ff452bf0 nex=0 xsz=0xff80
EXTENT 0 addr=110490080
  Chunk        110490090 sz=     7800    perm      "perm           "  alo=4480
  Chunk        110491f08 sz=    57592    free      "               "
EXTENT 1 addr=110480080
  Chunk        110480090 sz=    16184    free      "               "
  Chunk        110483fc8 sz=      192    perm      "perm           "  alo=192
  Chunk        110484088 sz=    22136    free      "               "
  Chunk        110489700 sz=      360    freeable  "K2I iter       "
Dump of memory from 0x0000000110489700 to 0x0000000110489868
110489700 00B38F00 00000169 00000001 10484088  [.......i.....H@.]
110489710 00000001 04DEFFC0 0000BEA1 0000000A  [................]
110489720 00000008 00000000 00000001 104897E4  [.............H..]
110489730 00000001 10489824 00000000 00000000  [.....H.$........]
.
.
.
110489860 00000000 00000000                    [........]       
  Chunk        110489868 sz=    26520    free      "               "
EXTENT 2 addr=110460080
  Chunk        110460090 sz=     2200    perm      "perm           "  alo=2200
  Chunk        110460928 sz=    63192    free      "               "
EXTENT 3 addr=110450098
  Chunk        1104500a8 sz=    41392    perm      "perm           "  alo=41392
  Chunk        11045a258 sz=    23976    free      "               "
Total heap size    =   261544
FREE LISTS:
 Bucket 0 size=56
 Bucket 1 size=88
 Bucket 2 size=152
 Bucket 3 size=168
 Bucket 4 size=280
 Bucket 5 size=432
 Bucket 6 size=536
 Bucket 7 size=1048
 Bucket 8 size=2072
 Bucket 9 size=4120
 Bucket 10 size=8216
  Chunk        110480090 sz=    16184    free      "               "
 Bucket 11 size=16408
  Chunk        11045a258 sz=    23976    free      "               "
  Chunk        110489868 sz=    26520    free      "               "
  Chunk        110484088 sz=    22136    free      "               "
 Bucket 12 size=32792
  Chunk        110460928 sz=    63192    free      "               "
  Chunk        110491f08 sz=    57592    free      "               "
 Bucket 13 size=65560
 Bucket 14 size=131096
 Bucket 15 size=262168
 Bucket 16 size=524312
 Bucket 17 size=2097176
Total free space   =   209600
UNPINNED RECREATABLE CHUNKS (lru first):
PERMANENT CHUNKS:
  Chunk        110490090 sz=     7800    perm      "perm           "  alo=4480
  Chunk        110483fc8 sz=      192    perm      "perm           "  alo=192
  Chunk        110460090 sz=     2200    perm      "perm           "  alo=2200
  Chunk        1104500a8 sz=    41392    perm      "perm           "  alo=41392
Permanent space    =    51584
******************************************************
*** 2011-10-16 04:31:31.116
ksedmp: internal or fatal error
ORA-00600: internal error code, arguments: [729], [360], [space leak], [], [], [], [], []
----- Call Stack Trace -----
calling              call     entry                argument values in hex     
location             type     point                (? means dubious value)    
-------------------- -------- -------------------- ----------------------------
ksedst+001c          bl       ksedst1              088424844 ? 041124844 ?
ksedmp+0290          bl       ksedst               104A506E8 ?
ksfdmp+0018          bl       03F4BE78            
kgeriv+0108          bl       _ptrgl              
kgesiv+0080          bl       kgeriv               10008FD0C ? 1100CAFF0 ?
                                                   000000000 ? 00000000A ?
                                                   1100CB230 ?
ksesic2+0060         bl       kgesiv               110000BF8 ? 104B032A8 ?
                                                   FFFFFFFFFFF9260 ? 000000000 ?
                                                   7000013FF453A10 ?
ksmuhe+02dc          bl       ksesic2              2D9000002D9 ? 000000000 ?
                                                   000000168 ? 000000001 ?
                                                   00000000A ? 104A4F2D8 ?
                                                   000000000 ? 000000000 ?
ksmugf+01b8          bl       03F49FA0            
ksuxds+0c04          bl       01FB5D60            
ksudel+0054          bl       ksuxds               7000013FF452BF0 ? 104B032A8 ?
opilof+0c7c          bl       03F49D84            
opiodr+0ae0          bl       _ptrgl              
ttcpip+1020          bl       _ptrgl              
opitsk+1124          bl       ttcpip               1100CB0D8 ? FFFFFFFFFFFBBB0 ?
                                                   000000001 ? 000000000 ?
                                                   FFFFFFFFFFFBB30 ? 1100E0428 ?
                                                   000000000 ? 1104B0B70 ?
opiino+0990          bl       opitsk               000000000 ? 000000000 ?
opiodr+0ae0          bl       _ptrgl              
opidrv+0484          bl       01FB7E64            
sou2o+0090           bl       opidrv               3C02AB90DC ? 440660000 ?
                                                   FFFFFFFFFFFF9D0 ?
opimai_real+01bc     bl       01FB5C2C            
main+0098            bl       opimai_real          000000000 ? 000000000 ?
__start+0098         bl       main                 000000000 ? 000000000 ?

--------------------- Binary Stack Dump ---------------------

在TRACE文件中，这个记录信息表明了内存泄漏的存在：

  Chunk        110489700 sz=      360    freeable  "K2I iter       "

而在TRACE文件中，还存在opilof函数，说明找个会话在进行LOGOFF操作。其实对于4000以下的内存泄漏，被认为是安全的，Oracle甚至提供了EVENTS 10262可以屏蔽这个错误的产生。而如果在alert文件中发现这个错误时，曾经泄漏的内存已经被释放，因此这个问题不会对实例的运行造成影响。

如果错误频繁发生，或者泄漏的空间超过4000或更高，可以进一步去分析，或者去寻找专门的补丁，Metalink文档Understanding and Diagnosing ORA-600 [729] Space Leak Errors [ID 403584.1]介绍了space leak相关的内容。