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The InnoDB write-ahead log ib_logfile0 is of fixed size, specified by innodb_log_file_size. If the tail of the log manages to overwrite the head (latest checkpoint) of the log, crash recovery will be broken. Let us clarify the messages about this, including adding a message on the completion of a log checkpoint that notes that the dangerous situation is over. To reproduce the dangerous scenario, we will introduce the debug injection label ib_log_checkpoint_avoid_hard, which will avoid log checkpoints even harder than the previous ib_log_checkpoint_avoid. log_t::overwrite_warned: The first known dangerous log sequence number. Set in log_close() and cleared in log_write_checkpoint_info(), which will output a "Crash recovery was broken" message. |
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| .. | ||
| buf0block_hint.cc | ||
| buf0buddy.cc | ||
| buf0buf.cc | ||
| buf0checksum.cc | ||
| buf0dblwr.cc | ||
| buf0dump.cc | ||
| buf0flu.cc | ||
| buf0lru.cc | ||
| buf0rea.cc | ||