Error 1206 Hy000 Mysql
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panelSmartphoneAndroidclose this panelPersonalFinancesPassive Incomeclose this panel You are hereHome » [SOLVED] ERROR 1206 (HY000): The total number... [SOLVED] ERROR 1206 (HY000): The total number of locks exceeds the lock table size posted on 2014-05-23 We have a customized Openbravo POS v2.2 running with a dozen workstations operating 24x7 error hy000 mysql odbc 5.1 driver access denied for user a year around. The size of the database has grown to 10GB, and
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the performance started to degrade so we decided to archive old data and start fresh. According to Openbravo POS administrative error 2002 hy000 mysql centos guide, we performed a DELETE operation on transaction data. delete from ticketlines; delete from tickets; delete from payments; /* Delete payments before receipts */ delete from receipts; delete from taxlines; delete from
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closedcash; delete from stockdiary; delete from stockcurrent; delete from reservation_customers; delete from reservations; Upon deleting ticketlines, "ERROR 1206 (HY000): The total number of locks exceeds the lock table size" error occurred. Also, deletion of all table data took 6 hours -- which was a BIG surprise for me. InnoDB stores the lock tables in the buffer pool, and it throws the above error when error 1215 hy000 mysql the buffer pool runs out of memory. By default, MySQL allocates 128MB of space for innodb_buffer_pool_size. To resolve the problem, you'll have to increase the size in /etc/my.cnf file. ## Edit /etc/my.cnf file, and add the following under the [mysqld] heading. innodb_buffer_pool_size=256M You'll have to tweak the value of innodb_buffer_pool_size as having large buffer size could introduce Fatal error: cannot allocate memory for the buffer pool problem. You'll have to restart the mysqld service in order to take this new value into effect. # service mysqld restart Tags:sqlmysql Add new comment Comments If DELETE statements not in Permalink On Thu, 12/11/2014 - 03:00 If DELETE statements not in transaction and without WHERE, use TRUNCATE TABLE instead. By Zerg (not verified) reply Add new comment Your name Comment * More information about text formats Text format Filtered HTMLPlain text Filtered HTMLWeb page addresses and e-mail addresses turn into links automatically.Allowed HTML tags:
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Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it the total number of locks exceeds the lock table size mysql only takes a minute: Sign up The total number of locks exceeds the lock table size up vote 37 down vote favorite 5 I'm running a report in MySQL. One of the queries involves inserting a large amount of http://www.webtrafficexchange.com/solved-error-1206-hy000-total-number-locks-exceeds-lock-table-size rows into a temp table. When I try to run it, I get this error: Error code 1206: The number of locks exceeds the lock table size. The queries in question are: create temporary table SkusBought( customerNum int(11), sku int(11), typedesc char(25), key `customerNum` (customerNum) )ENGINE=InnoDB DEFAULT CHARSET=latin1; insert into skusBought select t1.* from (select customer, sku, typedesc from transactiondatatransit where (cat = 150 or cat = 151) AND daysfrom07jan1 > 731 group by customer, sku union select customer, sku, http://stackoverflow.com/questions/6901108/the-total-number-of-locks-exceeds-the-lock-table-size typedesc from transactiondatadelaware where (cat = 150 or cat = 151) AND daysfrom07jan1 > 731 group by customer, sku union select customer, sku, typedesc from transactiondataprestige where (cat = 150 or cat = 151) AND daysfrom07jan1 > 731 group by customer, sku) t1 join (select customernum from topThreetransit group by customernum) t2 on t1.customer = t2.customernum; I've read that changing the configuration file to increase the buffer pool size will help, but that does nothing. What would be the way to fix this, either as a temporary workaround or a permanent fix? EDIT: changed part of the query. Shouldn't affect it, but I did a find-replace all and didn't realize it screwed that up. Doesn't affect the question. EDIT 2: Added typedesc to t1. I changed it in the query but not here. mysql sql share|improve this question edited Aug 3 '11 at 13:10 asked Aug 1 '11 at 15:59 maxman92 213135 Why are you grouping in the sub-selects? –Tim Aug 1 '11 at 18:54 I find this hard to understand. If t2.customernum = t1.customer it doesn't make sense to select only customernum from topThreetransit. Surely SkusBought.typedesc is then the same customer code as the first column? –RedGrittyBrick Aug 3 '11 at 8:53 t2 is a subset of customers in t1. The join is to get rid of customers in t1 that aren't in t2. The code for typedesc is actually incorrect.
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allocates a fixed size area for row locking information in RAM. The size of this area is 5 * 4 * NBLOCKS, where NBLOCKS is the number of pages in the buffer pool, equal to it size in bytes divided by 16384. Running out of space for locks usually indicates that the small default size of the InnoDB buffer pool is being used or operations on very large tables are being attempted with a huge number of row locks, perhaps comparing several large tables. In a dedicated system you can use up to 80% of the total RAM in the system for the InnoDB buffer pool. The example files my-large.cnf, my-huge.cnf and my-innodb-heavy-4G.cnf give examples of my.cnf settings you may want to use for various amounts of RAM allocated to MySQL. Solution If you are already using a suitable size and the operation you're attempting is rare, you may want to temporarily increase the RAM allocated to the buffer pool. If that still doesn't work, you may need to split your work into several pieces, increase the amount of RAM in the system, possibly change from a 32 bit to 64 bit system to allow you to use the RAM or change the MySQL source code to increase the amount of RAM allocated to the locking information. Temporarily copying the data to work tables using the MyISAM storage engine may allow you to do the work without having to use the locking system that InnoDB needs to use to support its ACID properties.