mirror of
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dd99780967
PURGE BINARY LOGS did not always purge binary logs. This commit fixes
some of the issues and adds notifications if a binary log cannot be
purged.
User visible changes:
- 'PURGE BINARY LOG TO log_name' and 'PURGE BINARY LOGS BEFORE date'
worked differently. 'TO' ignored 'slave_connections_needed_for_purge'
while 'BEFORE' did not. Now both versions ignores the
'slave_connections_needed_for_purge variable'.
- 'PURGE BINARY LOG..' commands now returns 'note' if a binary log cannot
be deleted like
Note 1375 Binary log 'master-bin.000004' is not purged because it is
the current active binlog
- Automatic binary log purges, based on date or size, will write a
note to the error log if a binary log matching the size or date
cannot yet be deleted.
- If 'slave_connections_needed_for_purge' is set from a config or
command line, it is set to 0 if Galera is enabled and 1 otherwise
(old default). This ensures that automatic binary log purge works
with Galera as before the addition of
'slave_connections_needed_for_purge'.
If the variable is changed to 0, a warning will be printed to the error
log.
Code changes:
- Added THD argument to several purge_logs related functions that needed
THD.
- Added 'interactive' options to purge_logs functions. This allowed
me to remove testing of sql_command == SQLCOM_PURGE.
- Changed purge_logs_before_date() to first check if log is applicable
before calling can_purge_logs(). This ensures we do not get a
notification for logs that does not match the remove criteria.
- MYSQL_BIN_LOG::can_purge_log() will write notifications to the user
or error log if a log cannot yet be removed.
- log_in_use() will return reason why a binary log cannot be removed.
Changes to keep code consistent:
- Moved checking of binlog_format for Galera to be after Galera is
initialized (The old check never worked). If Galera is enabled
we now change the binlog_format to ROW, with a warning, instead of
aborting the server. If this change happens a warning will be printed to
the error log.
- Print a warning if Galera or FLASHBACK changes the binlog_format
to ROW. Before it was done silently.
Reviewed by: Sergei Golubchik <serg@mariadb.com>,
Kristian Nielsen <knielsen@knielsen-hq.org>
231 lines
8.3 KiB
Text
231 lines
8.3 KiB
Text
SET GLOBAL max_binlog_size= 4096;
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SET GLOBAL innodb_flush_log_at_trx_commit= 1;
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RESET MASTER;
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CREATE TABLE t1 (a INT PRIMARY KEY, b MEDIUMTEXT) ENGINE=Innodb;
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INSERT INTO t1 VALUES (100, REPEAT("x", 4100));
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INSERT INTO t1 VALUES (101, REPEAT("x", 4100));
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INSERT INTO t1 VALUES (102, REPEAT("x", 4100));
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connect con1,localhost,root,,;
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SET DEBUG_SYNC= "ha_commit_trans_before_log_and_order SIGNAL con1_wait WAIT_FOR con1_cont";
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SET DEBUG_SYNC= "commit_after_group_release_commit_ordered SIGNAL con1_ready WAIT_FOR _ever";
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INSERT INTO t1 VALUES (1, REPEAT("x", 4100));
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connection default;
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SET DEBUG_SYNC= "now WAIT_FOR con1_wait";
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connect con2,localhost,root,,;
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SET DEBUG_SYNC= "ha_commit_trans_before_log_and_order SIGNAL con2_wait WAIT_FOR con2_cont";
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SET DEBUG_SYNC= "commit_after_group_release_commit_ordered SIGNAL con2_ready WAIT_FOR _ever";
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INSERT INTO t1 VALUES (2, NULL);
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connection default;
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SET DEBUG_SYNC= "now WAIT_FOR con2_wait";
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connect con3,localhost,root,,;
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SET DEBUG_SYNC= "ha_commit_trans_before_log_and_order SIGNAL con3_wait WAIT_FOR con3_cont";
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SET DEBUG_SYNC= "commit_after_group_release_commit_ordered SIGNAL con3_ready WAIT_FOR _ever";
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INSERT INTO t1 VALUES (3, REPEAT("x", 4100));
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connection default;
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SET DEBUG_SYNC= "now WAIT_FOR con3_wait";
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connect con4,localhost,root,,;
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SET DEBUG_SYNC= "ha_commit_trans_before_log_and_order SIGNAL con4_wait WAIT_FOR con4_cont";
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SET SESSION debug_dbug="+d,crash_commit_after_log";
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INSERT INTO t1 VALUES (4, NULL);
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connection default;
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SET DEBUG_SYNC= "now WAIT_FOR con4_wait";
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SET DEBUG_SYNC= "now SIGNAL con1_cont";
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SET DEBUG_SYNC= "now WAIT_FOR con1_ready";
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SET DEBUG_SYNC= "now SIGNAL con2_cont";
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SET DEBUG_SYNC= "now WAIT_FOR con2_ready";
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SET DEBUG_SYNC= "now SIGNAL con3_cont";
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SET DEBUG_SYNC= "now WAIT_FOR con3_ready";
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show binary logs;
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Log_name File_size
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master-bin.000001 #
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master-bin.000002 #
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master-bin.000003 #
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master-bin.000004 #
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master-bin.000005 #
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master-bin.000006 #
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include/show_binlog_events.inc
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000003 # Format_desc # # SERVER_VERSION, BINLOG_VERSION
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master-bin.000003 # Start_encryption # #
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master-bin.000003 # Gtid_list # # [#-#-#]
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master-bin.000003 # Binlog_checkpoint # # master-bin.000002
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master-bin.000003 # Binlog_checkpoint # # master-bin.000003
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master-bin.000003 # Gtid # # BEGIN GTID #-#-#
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master-bin.000003 # Annotate_rows # # INSERT INTO t1 VALUES (102, REPEAT("x", 4100))
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master-bin.000003 # Table_map # # table_id: # (test.t1)
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master-bin.000003 # Write_rows_v1 # # table_id: # flags: STMT_END_F
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master-bin.000003 # Xid # # COMMIT /* XID */
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master-bin.000003 # Rotate # # master-bin.000004;pos=POS
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include/show_binlog_events.inc
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000004 # Format_desc # # SERVER_VERSION, BINLOG_VERSION
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master-bin.000004 # Start_encryption # #
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master-bin.000004 # Gtid_list # # [#-#-#]
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master-bin.000004 # Binlog_checkpoint # # master-bin.000003
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master-bin.000004 # Binlog_checkpoint # # master-bin.000004
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master-bin.000004 # Gtid # # BEGIN GTID #-#-#
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master-bin.000004 # Annotate_rows # # INSERT INTO t1 VALUES (1, REPEAT("x", 4100))
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master-bin.000004 # Table_map # # table_id: # (test.t1)
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master-bin.000004 # Write_rows_v1 # # table_id: # flags: STMT_END_F
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master-bin.000004 # Xid # # COMMIT /* XID */
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master-bin.000004 # Rotate # # master-bin.000005;pos=POS
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include/show_binlog_events.inc
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000005 # Format_desc # # SERVER_VERSION, BINLOG_VERSION
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master-bin.000005 # Start_encryption # #
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master-bin.000005 # Gtid_list # # [#-#-#]
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master-bin.000005 # Binlog_checkpoint # # master-bin.000004
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master-bin.000005 # Gtid # # BEGIN GTID #-#-#
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master-bin.000005 # Annotate_rows # # INSERT INTO t1 VALUES (2, NULL)
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master-bin.000005 # Table_map # # table_id: # (test.t1)
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master-bin.000005 # Write_rows_v1 # # table_id: # flags: STMT_END_F
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master-bin.000005 # Xid # # COMMIT /* XID */
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master-bin.000005 # Gtid # # BEGIN GTID #-#-#
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master-bin.000005 # Annotate_rows # # INSERT INTO t1 VALUES (3, REPEAT("x", 4100))
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master-bin.000005 # Table_map # # table_id: # (test.t1)
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master-bin.000005 # Write_rows_v1 # # table_id: # flags: STMT_END_F
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master-bin.000005 # Xid # # COMMIT /* XID */
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master-bin.000005 # Rotate # # master-bin.000006;pos=POS
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include/show_binlog_events.inc
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000006 # Format_desc # # SERVER_VERSION, BINLOG_VERSION
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master-bin.000006 # Start_encryption # #
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master-bin.000006 # Gtid_list # # [#-#-#]
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master-bin.000006 # Binlog_checkpoint # # master-bin.000004
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PURGE BINARY LOGS TO "master-bin.000006";
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Warnings:
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Note 1375 Binary log 'master-bin.000004' is not purged because it may be needed for crash recovery (XID)
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show binary logs;
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Log_name File_size
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master-bin.000004 #
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master-bin.000005 #
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master-bin.000006 #
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SET DEBUG_SYNC= "now SIGNAL con4_cont";
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connection con4;
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Got one of the listed errors
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connection default;
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SELECT a FROM t1 ORDER BY a;
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a
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1
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2
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3
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4
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100
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101
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102
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Test that with multiple binlog checkpoints, recovery starts from the last one.
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SET GLOBAL max_binlog_size= 4096;
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SET GLOBAL innodb_flush_log_at_trx_commit= 1;
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RESET MASTER;
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connect con10,localhost,root,,;
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SET DEBUG_SYNC= "commit_after_group_release_commit_ordered SIGNAL con10_ready WAIT_FOR con10_cont";
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INSERT INTO t1 VALUES (10, REPEAT("x", 4100));
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connection default;
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SET DEBUG_SYNC= "now WAIT_FOR con10_ready";
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connect con11,localhost,root,,;
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SET DEBUG_SYNC= "commit_after_group_release_commit_ordered SIGNAL con11_ready WAIT_FOR con11_cont";
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INSERT INTO t1 VALUES (11, REPEAT("x", 4100));
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connection default;
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SET DEBUG_SYNC= "now WAIT_FOR con11_ready";
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connect con12,localhost,root,,;
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SET DEBUG_SYNC= "commit_after_group_release_commit_ordered SIGNAL con12_ready WAIT_FOR con12_cont";
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INSERT INTO t1 VALUES (12, REPEAT("x", 4100));
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connection default;
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SET DEBUG_SYNC= "now WAIT_FOR con12_ready";
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INSERT INTO t1 VALUES (13, NULL);
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show binary logs;
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Log_name File_size
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master-bin.000001 #
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master-bin.000002 #
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master-bin.000003 #
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master-bin.000004 #
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include/show_binlog_events.inc
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000004 # Format_desc # # SERVER_VERSION, BINLOG_VERSION
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master-bin.000004 # Start_encryption # #
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master-bin.000004 # Gtid_list # # [#-#-#]
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master-bin.000004 # Binlog_checkpoint # # master-bin.000001
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master-bin.000004 # Gtid # # BEGIN GTID #-#-#
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master-bin.000004 # Annotate_rows # # INSERT INTO t1 VALUES (13, NULL)
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master-bin.000004 # Table_map # # table_id: # (test.t1)
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master-bin.000004 # Write_rows_v1 # # table_id: # flags: STMT_END_F
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master-bin.000004 # Xid # # COMMIT /* XID */
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SET DEBUG_SYNC= "now SIGNAL con10_cont";
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connection con10;
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connection default;
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SET DEBUG_SYNC= "now SIGNAL con12_cont";
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connection con12;
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connection default;
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SET DEBUG_SYNC= "now SIGNAL con11_cont";
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connection con11;
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connection default;
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Now crash the server
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SET SESSION debug_dbug="+d,crash_commit_after_log";
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INSERT INTO t1 VALUES (14, NULL);
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Got one of the listed errors
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connection default;
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SELECT a FROM t1 ORDER BY a;
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a
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1
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2
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3
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4
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10
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11
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12
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13
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14
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100
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101
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102
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*** Check that recovery works if we crashed early during rotate, before
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*** binlog checkpoint event could be written.
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SET GLOBAL max_binlog_size= 4096;
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SET GLOBAL innodb_flush_log_at_trx_commit= 1;
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RESET MASTER;
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INSERT INTO t1 VALUES (21, REPEAT("x", 4100));
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INSERT INTO t1 VALUES (22, REPEAT("x", 4100));
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INSERT INTO t1 VALUES (23, REPEAT("x", 4100));
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SET SESSION debug_dbug="+d,crash_before_write_checkpoint_event";
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INSERT INTO t1 VALUES (24, REPEAT("x", 4100));
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Got one of the listed errors
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SELECT a FROM t1 ORDER BY a;
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a
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1
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2
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3
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4
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10
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11
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12
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13
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14
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21
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22
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23
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24
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100
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101
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102
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show binary logs;
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Log_name File_size
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master-bin.000001 #
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master-bin.000002 #
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master-bin.000003 #
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master-bin.000004 #
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master-bin.000005 #
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include/show_binlog_events.inc
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000004 # Format_desc # # SERVER_VERSION, BINLOG_VERSION
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master-bin.000004 # Start_encryption # #
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master-bin.000004 # Gtid_list # # [#-#-#]
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master-bin.000004 # Binlog_checkpoint # # master-bin.000003
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master-bin.000004 # Binlog_checkpoint # # master-bin.000004
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master-bin.000004 # Gtid # # BEGIN GTID #-#-#
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master-bin.000004 # Annotate_rows # # INSERT INTO t1 VALUES (24, REPEAT("x", 4100))
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master-bin.000004 # Table_map # # table_id: # (test.t1)
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master-bin.000004 # Write_rows_v1 # # table_id: # flags: STMT_END_F
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master-bin.000004 # Xid # # COMMIT /* XID */
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master-bin.000004 # Rotate # # master-bin.000005;pos=POS
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connection default;
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DROP TABLE t1;
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