Commit 5a7198f5 authored by unknown's avatar unknown
Browse files

trx0undo.c, trx0purge.c: 

  Print a warning to the .err log if the InnoDB history list length is > 20 000 even though purge reaches the list head; this is to track corruption reported on the MySQL mailing list Nov 9, 2004
lock0lock.c:
  Let SHOW INNODB STATUS print the history list length


innobase/lock/lock0lock.c:
  Let SHOW INNODB STATUS print the history list length
innobase/trx/trx0purge.c:
  Print a warning to the .err log if the InnoDB history list length is > 20 000 even though purge reaches the list head; this is to track corruption reported on the MySQL mailing list Nov 9, 2004
innobase/trx/trx0undo.c:
  Print a warning to the .err log if the InnoDB history list length is > 20 000 even though purge reaches the list head; this is to track corruption reported on the MySQL mailing list Nov 9, 2004
parent 2d0011fc

innobase/lock/lock0lock.c

+3 −0
Original line number Diff line number Diff line
@@ -4063,6 +4063,9 @@ lock_print_info( 
		(ulong) ut_dulint_get_high(purge_sys->purge_undo_no),

		(ulong) ut_dulint_get_low(purge_sys->purge_undo_no));



	fprintf(file,

	"History list length %lu\n", (ulong) trx_sys->rseg_history_len);



	fprintf(file,

		"Total number of lock structs in row lock hash table %lu\n",

					 (ulong) lock_get_n_rec_locks());

innobase/trx/trx0purge.c

+22 −1
Original line number Diff line number Diff line
@@ -646,6 +646,27 @@ trx_purge_rseg_get_next_history_log( 
		mutex_exit(&(rseg->mutex));

		mtr_commit(&mtr);



		mutex_enter(&kernel_mutex);

		

		/* Add debug code to track history list corruption reported

		on the MySQL mailing list on Nov 9, 2004. The fut0lst.c

		file-based list was corrupt. The prev node pointer was

		FIL_NULL, even though the list length was over 8 million nodes!

		We assume that purge truncates the history list in moderate

		size pieces, and if we here reach the head of the list, the

		list cannot be longer than 20 000 undo logs now. */

	

		if (trx_sys->rseg_history_len > 20000) {

			ut_print_timestamp(stderr);

			fprintf(stderr,

"  InnoDB: Warning: purge reached the head of the history list,\n"

"InnoDB: but its length is still reported as %lu! Make a detailed bug\n"

"InnoDB: report, and post it to bugs.mysql.com\n",

					(ulong)trx_sys->rseg_history_len);

		}



		mutex_exit(&kernel_mutex);



		return;

	}

innobase/trx/trx0undo.c

+1 −1

File changed.

Contains only whitespace changes.