[20220124]验证oradebug dump heapdump 2050中chunk的第1字节表示chunk size+1.txt

[20220124]验证oradebug dump heapdump 2050中chunk的第1字节表示chunk size+1.txt --//验证oradebug dump heapdump 2050中chunk的第1字节表示chunk size+1,顺便复习awk的使用. 1.环境: SCOTT@book> @ver1 PORT_STRING                    VERSION        BANNER ------------------------------ -------------- -------------------------------------------------------------------------------- x86_64/Linux 2.4.xx            11.2.0.4.0     Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production 2.堆转储: SYS@book> oradebug setmypid Statement processed. SYS@book> oradebug dump heapdump 2050; Statement processed. --//注意很慢如果共享池内存占用很大的情况,我自己的测试环境也不快. SYS@book> @ ttt tracefile_identifier = /u01/app/oracle/diag/rdbms/book/book/trace/book_ora_26777.trc 3.分析看看. $ grep -A1 "^Dump of memory from" book_ora_26777.trc | awk '/^Dump of memory from/{print strtonum($7)-strtonum($5)} ; /]$/{print strtonum("0x"$2)-1}'| head 48 48 856 856 4424 4424 6432 6432 32552 32552 $ grep -A1 "^Dump of memory from" book_ora_26777.trc | awk '/^Dump of memory from/{print strtonum($7)-strtonum($5)} ; /]$/{print strtonum("0x"$2)-1}'| tail 3966176 3966176 3962232 3962232 3980400 3980400 3799184 3799184 80 80 --//视乎能对上. $ grep -A1 "^Dump of memory from" book_ora_26777.trc | awk '/^Dump of memory from/{printf "%d ", strtonum($7)-strtonum($5)} ; /]$/{print strtonum("0x"$2)-1}' | \  awk '{ if ($1 != $2 ) print $1 $2 " not equal"}' --//OK,说明我前面测试推断一致,chunk开始的地址记录的内存就是ckunk size+1.