2022-04-21 mysql-innodb存储引擎srv_start处理记录

摘要:

mysql-innodb存储引擎核心处理

核心函数:

srv_start:

dberr_t srv_start(bool create_new_db) {
  lsn_t flushed_lsn;

  /* just for assertions */
  lsn_t previous_lsn;

  /* output from call to create_log_files(...) */
  lsn_t new_checkpoint_lsn = 0;

  page_no_t sum_of_data_file_sizes;
  page_no_t tablespace_size_in_header;
  dberr_t err;
  uint32_t srv_n_log_files_found = srv_n_log_files;
  mtr_t mtr;
  purge_pq_t *purge_queue;
  char logfilename[10000];
  char *logfile0 = nullptr;
  size_t dirnamelen;
  unsigned i = 0;

  assert(srv_dict_metadata == nullptr);
  /* Reset the start state. */
  srv_start_state = SRV_START_STATE_NONE;

#ifdef UNIV_LINUX
#ifdef HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE
  ib::info(ER_IB_MSG_1107);
#else
  ib::info(ER_IB_MSG_1108);
#endif /* HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE */
#endif /* UNIV_LINUX */

  if (sizeof(ulint) != sizeof(void *)) {