这篇文章主要介绍“mysqld got signal举例分析”，在日常操作中，相信很多人在mysqld got signal举例分析问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”mysqld got signal举例分析”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
Description: When SELECTing from a timestamp based range partition where the table has no partition to handle values less than MAXVALUE and the SELECT condition reads from the last partition or greater, mysqld gets a signal 8.
Repeatable with 5.5.23, 5.5.24 and 5.5.25, NOT with 5.5.20, 5.5.21, 5.5.22 How to repeat: [revin@forge msb_5_5_24]$ ./use test
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Welcome to the MySQL monitor. Commands end with ; or /g.
Your MySQL connection id is 1
Server version: 5.5.24 MySQL Community Server (GPL)
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '/h' for help. Type '/c' to clear the current input statement.
mysql [localhost] {msandbox} (test) > show create table table_XXXXX /G
*************************** 1. row ***************************
Table: table_XXXXX
Create Table: CREATE TABLE `table_XXXXX` (
`record_type` smallint(5) unsigned NOT NULL,
`timestamp` int(10) unsigned NOT NULL,
`meta_pos_id` smallint(5) unsigned NOT NULL,
`value` mediumint(8) unsigned NOT NULL,
KEY `ts_rtype` (`timestamp`,`record_type`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
/*!50100 PARTITION BY RANGE (timestamp)
(PARTITION 2012y03m VALUES LESS THAN (1333238400) ENGINE = InnoDB,
PARTITION 2012y04m VALUES LESS THAN (1335830400) ENGINE = InnoDB,
PARTITION 2012y05m VALUES LESS THAN (1338508800) ENGINE = InnoDB,
PARTITION 2012y06m VALUES LESS THAN (1341100800) ENGINE = InnoDB) */
1 row in set (0.00 sec)
mysql [localhost] {msandbox} (test) > SELECT COUNT(*) FROM table_XXXXX WHERE `timestamp` > 1338508800;
+----------+
| COUNT(*) |
+----------+
| 0 |
+----------+
1 row in set (0.00 sec)
mysql [localhost] {msandbox} (test) > SELECT COUNT(*) FROM table_XXXXX WHERE `timestamp` > 1341100799;
ERROR 2013 (HY000): Lost connection to MySQL server during query Suggested fix: NA, but a workaround is to add a partition to handle values less than MAXVALUE.
Backtrace from core file during one of the crashes. Attachment: 23293-backtrace.txt (text/plain), 13.89 KiB.
Error log from sandbox creation to crash then restart. Attachment: 23293-error-log.txt (text/plain), 9.63 KiB.
Thank you for the bug report. Indeed repeatable with 5.5.24 but not anymore with current source: Microsoft Windows [Version 6.1.7601] Copyright (c) 2009 Microsoft Corporation. All rights reserved. h:/dbs>55 h:/dbs>h:/dbs/5.5/bin/mysql -uroot --port=3540 --prompt="mysql 5.5 >" Welcome to the MySQL monitor. Commands end with ; or /g. Your MySQL connection id is 1 Server version: 5.5.24 Source distribution Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '/h' for help. Type '/c' to clear the current input statement. mysql 5.5 >use test Database changed mysql 5.5 >CREATE TABLE `table_XXXXX` ( -> `record_type` smallint(5) unsigned NOT NULL, -> `timestamp` int(10) unsigned NOT NULL, -> `meta_pos_id` smallint(5) unsigned NOT NULL, -> `value` mediumint(8) unsigned NOT NULL, -> KEY `ts_rtype` (`timestamp`,`record_type`) -> ) ENGINE=InnoDB DEFAULT CHARSET=latin1 -> /*!50100 PARTITION BY RANGE (timestamp) -> (PARTITION 2012y03m VALUES LESS THAN (1333238400) ENGINE = InnoDB, -> PARTITION 2012y04m VALUES LESS THAN (1335830400) ENGINE = InnoDB, -> PARTITION 2012y05m VALUES LESS THAN (1338508800) ENGINE = InnoDB, -> PARTITION 2012y06m VALUES LESS THAN (1341100800) ENGINE = InnoDB) */; Query OK, 0 rows affected (0.88 sec) mysql 5.5 >SELECT COUNT(*) FROM table_XXXXX WHERE `timestamp` > 1338508800; +----------+ | COUNT(*) | +----------+ | 0 | +----------+ 1 row in set (0.00 sec) mysql 5.5 >SELECT COUNT(*) FROM table_XXXXX WHERE `timestamp` > 1341100799; ERROR 2013 (HY000): Lost connection to MySQL server during query mysql 5.5 > Microsoft Windows [Version 6.1.7601] Copyright (c) 2009 Microsoft Corporation. All rights reserved. d:/dbs>55 d:/dbs>d:/dbs/5.5/bin/mysql -uroot --port=3541 --prompt="mysql 5.5 >" Welcome to the MySQL monitor. Commands end with ; or /g. Your MySQL connection id is 1 Server version: 5.5.26 Source distribution Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '/h' for help. Type '/c' to clear the current input statement. mysql 5.5 >use test Database changed mysql 5.5 >CREATE TABLE `table_XXXXX` ( -> `record_type` smallint(5) unsigned NOT NULL, -> `timestamp` int(10) unsigned NOT NULL, -> `meta_pos_id` smallint(5) unsigned NOT NULL, -> `value` mediumint(8) unsigned NOT NULL, -> KEY `ts_rtype` (`timestamp`,`record_type`) -> ) ENGINE=InnoDB DEFAULT CHARSET=latin1 -> /*!50100 PARTITION BY RANGE (timestamp) -> (PARTITION 2012y03m VALUES LESS THAN (1333238400) ENGINE = InnoDB, -> PARTITION 2012y04m VALUES LESS THAN (1335830400) ENGINE = InnoDB, -> PARTITION 2012y05m VALUES LESS THAN (1338508800) ENGINE = InnoDB, -> PARTITION 2012y06m VALUES LESS THAN (1341100800) ENGINE = InnoDB) */; Query OK, 0 rows affected (0.24 sec) mysql 5.5 >SELECT COUNT(*) FROM table_XXXXX WHERE `timestamp` > 1338508800; +----------+ | COUNT(*) | +----------+ | 0 | +----------+ 1 row in set (0.05 sec) mysql 5.5 >SELECT COUNT(*) FROM table_XXXXX WHERE `timestamp` > 1341100799; +----------+ | COUNT(*) | +----------+ | 0 | +----------+ 1 row in set (0.00 sec) mysql 5.5 >
Miguel, have you tried with 5.5.25 official Oracle binaries as I did?
Not sure why this is still marked as can't repeat - have you tested with official Oracle binaries yet?
The problem still exists on 5.5.25a, not sure why this is still can't repeat?
[revin@forge mysql]$ sb 5525
Welcome to the MySQL monitor. Commands end with ; or /g.
Your MySQL connection id is 2
Server version: 5.5.25a MySQL Community Server (GPL)
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '/h' for help. Type '/c' to clear the current input statement.
mysql [localhost] {msandbox} ((none)) > use test;
Database changed
mysql [localhost] {msandbox} (test) > CREATE TABLE `table_XXXXX` (
-> `record_type` smallint(5) unsigned NOT NULL,
-> `timestamp` int(10) unsigned NOT NULL,
-> `meta_pos_id` smallint(5) unsigned NOT NULL,
-> `value` mediumint(8) unsigned NOT NULL,
-> KEY `ts_rtype` (`timestamp`,`record_type`)
-> ) ENGINE=InnoDB DEFAULT CHARSET=latin1
-> /*!50100 PARTITION BY RANGE (timestamp)
-> (PARTITION 2012y03m VALUES LESS THAN (1333238400) ENGINE = InnoDB,
-> PARTITION 2012y04m VALUES LESS THAN (1335830400) ENGINE = InnoDB,
-> PARTITION 2012y05m VALUES LESS THAN (1338508800) ENGINE = InnoDB,
-> PARTITION 2012y06m VALUES LESS THAN (1341100800) ENGINE = InnoDB) */
-> ;
Query OK, 0 rows affected (0.01 sec)
mysql [localhost] {msandbox} (test) > SELECT COUNT(*) FROM table_XXXXX WHERE `timestamp` > 1338508800;
+----------+
| COUNT(*) |
+----------+
| 0 |
+----------+
1 row in set (0.00 sec)
mysql [localhost] {msandbox} (test) > SELECT COUNT(*) FROM table_XXXXX WHERE `timestamp` > 1341100799;
ERROR 2013 (HY000): Lost connection to MySQL server during query
mysql [localhost] {msandbox} (test) >
This is a know bug that is fixed in current code: macbook-pro:5.5 openxs$ bin/mysql -uroot test Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Welcome to the MySQL monitor. Commands end with ; or /g. Your MySQL connection id is 1 Server version: 5.5.28-debug Source distribution Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '/h' for help. Type '/c' to clear the current input statement. mysql> CREATE TABLE `table_XXXXX` ( -> `record_type` smallint(5) unsigned NOT NULL, -> `timestamp` int(10) unsigned NOT NULL, -> `meta_pos_id` smallint(5) unsigned NOT NULL, -> `value` mediumint(8) unsigned NOT NULL, -> KEY `ts_rtype` (`timestamp`,`record_type`) -> ) ENGINE=InnoDB DEFAULT CHARSET=latin1 -> /*!50100 PARTITION BY RANGE (timestamp) -> (PARTITION 2012y03m VALUES LESS THAN (1333238400) ENGINE = InnoDB, -> PARTITION 2012y04m VALUES LESS THAN (1335830400) ENGINE = InnoDB, -> PARTITION 2012y05m VALUES LESS THAN (1338508800) ENGINE = InnoDB, -> PARTITION 2012y06m VALUES LESS THAN (1341100800) ENGINE = InnoDB) */; Query OK, 0 rows affected (0.07 sec) mysql> SELECT COUNT(*) FROM table_XXXXX WHERE `timestamp` > 1338508800; +----------+ | COUNT(*) | +----------+ | 0 | +----------+ 1 row in set (0.00 sec) mysql> SELECT COUNT(*) FROM table_XXXXX WHERE `timestamp` > 1341100799; +----------+ | COUNT(*) | +----------+ | 0 | +----------+ 1 row in set (0.00 sec) So, please, wait for the official release of 5.5.27 with the fix.
Valeriy, Thanks - looks like Miguel tested with 5.5.26 - is this coming to .26 or .27 as you mentioned?
Ahh, nvm, found my answer :) http://dev.mysql.com/doc/refman/5.5/en/news-5-5-26.html
到此，关于“mysqld got signal举例分析”的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注亿速云网站，小编会继续努力为大家带来更多实用的文章！
原创文章，作者：奋斗，如若转载，请注明出处：https://blog.ytso.com/201391.html