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Note: Linux only Core dumps of large buffer pool pages take time and space and pose potential data expose in scenarios where data-at-rest encryption is deployed. Here we use madvise(MADV_DONT_DUMP) on large memory allocations used by the innodb buffer pool, log_sys and recv_sys. The effect of this system call is that these memory areas will not appear in a core dump. Data from these buffers is rarely useful in fault diagnosis. log_sys and recv_sys structures now use large memory allocations for their large buffer. Debug builds don't include the madvise syscall and as such will include full core dumps. A function, buf_madvise_do_dump, is added but never called. It is there to be called from a debugger to re-enable the core dumping of all of these pages if for some reason the entire contents of these buffers are needed. Idea thanks to Hartmut Holzgraefe |
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| .. | ||
| buf0buddy.cc | ||
| buf0buf.cc | ||
| buf0checksum.cc | ||
| buf0dblwr.cc | ||
| buf0dump.cc | ||
| buf0flu.cc | ||
| buf0lru.cc | ||
| buf0rea.cc | ||