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[作者 高健@博客园 luckyjackgao@gmail.com]
用valgrind来分析pgpool的执行，会看到有如下几种情形有可能产生内存泄漏：
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A extract_string 调用 strdup
==27927== 3 bytes in 1 blocks are possibly lost in loss record 3 of 100
==27927== at 0x4A05E1C: malloc (vg_replace_malloc.c:195)
==27927== by 0x3C51E798C1: strdup (in /lib64/libc-2.5.so)
==27927== by 0x40C9C4: extract_string (pool_config.l:2065)
==27927== by 0x410D52: pool_get_config (pool_config.l:1756)
==27927== by 0x4066B5: main (main.c:320)
==27927==
B read_startup_packet 调用 calloc
==27927== 594 (528 direct, 66 indirect) bytes in 11 blocks are definitely lost in loss record 85 of 100
==27927== at 0x4A05140: calloc (vg_replace_malloc.c:418)
==27927== by 0x40895B: read_startup_packet (child.c:803)
==27927== by 0x409663: do_child (child.c:210)
==27927== by 0x403F04: fork_a_child (main.c:1073)
==27927== by 0x406C00: main (main.c:550)
==27927==
C save_ps_display_args 调用 malloc
==27927== 1,602 (256 direct, 1,346 indirect) bytes in 1 blocks are definitely lost in loss record 92 of 100
==27927== at 0x4A05E1C: malloc (vg_replace_malloc.c:195)
==27927== by 0x434605: save_ps_display_args (ps_status.c:173)
==27927== by 0x403ECA: fork_a_child (main.c:1066)
==27927== by 0x406C00: main (main.c:550)
==27927==
D extract_string_tokens 调用 malloc
==27927== 24,630 (24,576 direct, 54 indirect) bytes in 3 blocks are definitely lost in loss record 100 of 100
==27927== at 0x4A05E1C: malloc (vg_replace_malloc.c:195)
==27927== by 0x40C8FC: extract_string_tokens (pool_config.l:2191)
==27927== by 0x41177B: pool_get_config (pool_config.l:1657)
==27927== by 0x4066B5: main (main.c:320)
==27927==
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后面将陆续对其进行分析。
本文转自健哥的数据花园博客园博客，原文链接：http://www.cnblogs.com/gaojian/archive/2012/08/21/2648982.html，如需转载请自行联系原作者
