> In less technical terms, if the master goes faster than the slave, the slave > will puke.
MG>then the master will have to teach the slave MG>is the master the entrenched bureacucrat or is that the slave? > > Regards, > > Jerry Schwartz > Global Information Incorporated > 195 Farmington Ave. > Farmington, CT 06032 > > 860.674.8796 / FAX: 860.674.8341 > > www.the-infoshop.com > > > > > > > > >Machiel Richards > > > > > >-----Original Message----- > >From: Machiel Richards [mailto:machi...@rdc.co.za] > >Sent: 02 June 2010 9:41 AM > >To: mysql@lists.mysql.com > >Subject: Strange errors / messages on slave server > > > >Good day all > > > > > > > > I hope someone can assist me with this. > > > > > > > > While doing the normal routine daily health checks on one of > >our clients' servers I came across some strange behaviour from the slave > >server. (two servers setup in master / slave replication) > > > > > > > > While looking at the current Innodb buffer pool usage > >(master server), I noticed that the usage went up from 44% yesterday to > >98.7% today, however nothing on the master server suggested why. > > > > > > > > I went on to look at the save server and found very strange > >behaviour (for me anyway) and I am hoping someone can assist in explaining > >this to me and some possible corrective actions: > > > > > > > > When running show slave status, it seems that there was an > >error logged which show in the output as below: > > > > > > > >mysql> show slave status; > > > >+----------------------------------+----------------------+-------------+--- > >----------+---------------+------------------+---------------------+-------- > >--------------+---------------+-----------------------+------------------+-- > >-----------------+-----------------+---------------------+------------------ > >--+------------------------+-------------------------+---------------------- > >-------+------------+------------------------------------------------------- > >---------------------------------------------------------------------------- > >--------------------------------------------------------------------+------- > >-------+---------------------+-----------------+-----------------+---------- > >------+---------------+--------------------+--------------------+----------- > >---------+-----------------+-------------------+----------------+----------- > >------------+ > > > >| Slave_IO_State | Master_Host | Master_User | > >Master_Port | Connect_Retry | Master_Log_File | Read_Master_Log_Pos | > >Relay_Log_File | Relay_Log_Pos | Relay_Master_Log_File | > >Slave_IO_Running | Slave_SQL_Running | Replicate_Do_DB | Replicate_Ignore_DB > >| Replicate_Do_Table | Replicate_Ignore_Table | Replicate_Wild_Do_Table | > >Replicate_Wild_Ignore_Table | Last_Errno | Last_Error > >| Skip_Counter | Exec_Master_Log_Pos | Relay_Log_Space | Until_Condition | > >Until_Log_File | Until_Log_Pos | Master_SSL_Allowed | Master_SSL_CA_File | > >Master_SSL_CA_Path | Master_SSL_Cert | Master_SSL_Cipher | Master_SSL_Key | > >Seconds_Behind_Master | > > > >+----------------------------------+----------------------+-------------+--- > >----------+---------------+------------------+---------------------+-------- > >--------------+---------------+-----------------------+------------------+-- > >-----------------+-----------------+---------------------+------------------ > >--+------------------------+-------------------------+---------------------- > >-------+------------+------------------------------------------------------- > >---------------------------------------------------------------------------- > >--------------------------------------------------------------------+------- > >-------+---------------------+-----------------+-----------------+---------- > >------+---------------+--------------------+--------------------+----------- > >---------+-----------------+-------------------+----------------+----------- > >------------+ > > > >| Waiting for master to send event | MASTER.SERVER | repladmin | > >3306 | 60 | mysql-bin.000327 | 672223064 | > >SLAVE-relay-bin.001016 | 598540830 | mysql-bin.000326 | Yes > >| No | | | > >| | | > >| 1206 | Error 'The total number of locks exceeds the lock table size' > >on query. Default database: 'profiler'. Query: 'update profile_options set > >`value` = REPLACE(`value`, '.', '') where list_item_id = 11' | 0 > >| 598540693 | 1746329551 | None | | > >0 | No | | | > >| | | NULL | > > > >+----------------------------------+----------------------+-------------+--- > >----------+---------------+------------------+---------------------+-------- > >--------------+---------------+-----------------------+------------------+-- > >-----------------+-----------------+---------------------+------------------ > >--+------------------------+-------------------------+---------------------- > >-------+------------+------------------------------------------------------- > >---------------------------------------------------------------------------- > >--------------------------------------------------------------------+------- > >-------+---------------------+-----------------+-----------------+---------- > >------+---------------+--------------------+--------------------+----------- > >---------+-----------------+-------------------+----------------+----------- > >------------+ > > > >1 row in set (0.00 sec) > > > > > > > >Then looking at the log files the following was found: > > > > > > > >100601 9:56:54 InnoDB: WARNING: over 67 percent of the buffer pool is > >occupied by > > > >InnoDB: lock heaps or the adaptive hash index! Check that your > > > >InnoDB: transactions do not set too many row locks. > > > >InnoDB: Your buffer pool size is 8 MB. Maybe you should make > > > >InnoDB: the buffer pool bigger? > > > >InnoDB: Starting the InnoDB Monitor to print diagnostics, including > > > >InnoDB: lock heap and hash index sizes. > > > >100601 9:56:54 [ERROR] Slave: Error 'The total number of locks exceeds the > >lock table size' on query. Default database: 'profiler'. Query: 'update > >profile_options set `value` = REPLACE(`value`, '.', '') where list_item_id = > >11', Error_code: 1206 > > > >100601 9:56:54 [ERROR] Error running query, slave SQL thread aborted. Fix > >the problem, and restart the slave SQL thread with "SLAVE START". We stopped > >at log 'mysql-bin.000326' position 598540693 > > > > > > > >===================================== > > > >100601 9:57:00 INNODB MONITOR OUTPUT > > > >===================================== > > > >Per second averages calculated from the last 61 seconds > > > >---------- > > > >SEMAPHORES > > > >---------- > > > >OS WAIT ARRAY INFO: reservation count 246260, signal count 246194 > > > >Mutex spin waits 0, rounds 2310610, OS waits 10307 > > > >RW-shared spins 423365, OS waits 208580; RW-excl spins 28923, OS waits 25636 > > > >------------ > > > >TRANSACTIONS > > > >------------ > > > >Trx id counter 0 12672316 > > > >Purge done for trx's n:o < 0 12672314 undo n:o < 0 0 > > > >History list length 1 > > > >Total number of lock structs in row lock hash table 0 > > > >LIST OF TRANSACTIONS FOR EACH SESSION: > > > >-------- > > > >FILE I/O > > > > > > > > Looking at the log output, firstly the same error is showing > >in the logs as well. > > > > Secondly, It also started running this INNODB MONITOR which > >generated thousands of entries in the log file (about 30000+ lines of > >output). > > > > > > > > I really hope that someone can assist with this one as I am > >still a fairly new dba and this is completely new to me... > > > >Appreciate all replies. > > > > > > > >Regards > > > >Machiel > > > > > > > >-- > >MySQL General Mailing List > >For list archives: http://lists.mysql.com/mysql > >To unsubscribe: http://lists.mysql.com/mysql?unsub=je...@gii.co.jp > > > > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: http://lists.mysql.com/mysql?unsub=mgai...@hotmail.com > _________________________________________________________________ Hotmail is redefining busy with tools for the New Busy. 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