Long semaphore waits and mysql crashes (3 replies)
We have a mysql database (version 5.7) with following configuration: skip-host-cache skip-name-resolve datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock secure-file-priv=/var/lib/mysql-files...
View ArticleHow to get growth rate used space of a table by month ? (1 reply)
Hi everyone. I'm a new using Mysql and I would like to know how to get growth rate used space of a table by month. Can you help me ? Thanks. Wander(Brazil)
View ArticleContinuously getting cache hit ratio 0 percent alert from nimsoft. (no replies)
Continuously getting cache hit ratio 0 percent alert from nimsoft. MYSQL version: 5.1.46-community Currently the counter setting are :- | query_cache_size | 16777216 | | query_cache_limit | 1048576 |...
View Articleinstalling and using keyring plugin (no replies)
I was trying to install keyring plugin on MySQL 5.7.18. I edited my.ini file. It was blank so I added the following text and restarted MySQL. [mysqld] early-plugin-load=keyring_file.dll I ran the...
View ArticleHow to insert single row in MySql Database (1 reply)
Can any body suggest me how to insert a single record in a table. With SQL queries for insertion.
View ArticleBackup Of all databases (3 replies)
Hello, I can take backup of an individual database, but would like to check how to get the backup of all user databases? If there is any standard script available kindly do share (Note: My InnodB...
View ArticleSuspicious UAF at storage/innobase/row/row0merge.cc (no replies)
Hi all, Our code scanner has pointed out a suspicious UAF at storage/innobase/row/row0merge.cc At https://github.com/mysql/mysql-server/blob/5.7/storage/innobase/row/row0merge.cc#L1946 //...
View ArticleMySQL 8.0.2 More Flexible InnoDB Undo Tablespace Management (no replies)
http://mysqlserverteam.com/mysql-8-0-2-more-flexible-undo-tablespace-management/
View ArticleMySQL and AUTO_INCREMENT columns in multiple-column index for InnoDB tables:...
Missing support for AUTO_INCREMENT columns in multiple-column index for InnoDB tables is a widely known limitation, as is the trigger workaround for when it is needed (see e.g this post [1])....
View ArticleUnknown type 245 in column 4 of 5 (3 replies)
Hi, We are facing issue with MySQL database (Innodb_version 5.7.11) . Could you please help me on this. Error : Unknown type 245 in column 4 of 5 in binary-encoded result set I am not able to...
View ArticleDeadlock Issue (3 replies)
Hi Forum, Please guide me for the below issue. We have recently upgraded the mysql DB to version 5.5 and one of the application is throwing the exception of "Deadlock found when trying to get lock;...
View ArticleHow to make a correct hot physical backup of MySql Innodb database with...
Hi everyone, I'm Oracle DBA and now I'm learning Mysql. I've been read lots of docs about Mysql backup. But I having a doubt about how to make a correct hot physical backup of a MySql Innodb database...
View ArticleAvoid fragmentation for Mysql tables (5 replies)
Hello All, I am new to mysql. fragmentation occurs for mysql tables whenever I do DML operations and also when I change execution engine from MyISAM to InnoDB. I can understand fragmentation for DML...
View ArticleDatabase slower from 5.5 to 5.7 and page_cleaner error (1 reply)
I have recently moved our system to a new server. From a Windows Server 2008 R2 with a MySQl 5.5 to Windows Server 2012 R2 where I installed MySQL 5.7. The new server has more RAM (8G), but other than...
View ArticleCase Sensitive file names on MacOS in innodb db (4 replies)
For many years I have used innodb for my databases. My table naming convention has been camel case. I recently upgraded my Macbook and I now find that MySql cannot find any of my tables that are camel...
View ArticleDB crashed help (no replies)
My VM ran out of disk space and MySQL wasn't able to write to the log file causing it to crash. I'm on mysql 5.6. Here is the error_log file: 2017-09-05T11:47:00.636352Z 0 [Note] InnoDB: Initializing...
View Articleversion locking details for update ... where ... (1 reply)
I wish to understand how optimistic locking based on a version num for a given row should be done in mysql. Assume that all my transactions are read-committed. begin trans select field1, field2,...
View ArticleWhat is the best way to handle deadlocks (1 reply)
Dear Sir, Wish to seek your advice how can we handle better of the following scenario, as we found too many deadlocks when doing the statements such as SELECT, INSERT ... ON DUPLICATE UPDATE....
View ArticleTable freeze when size exceeds innodb buffer pool size (8 replies)
I have a server which I have set the following innodb_buffer_pool=21G and total ram is 32. I did not specify 80% cause its running some other services besides the db too. Suddenly I saw my main data...
View ArticleIndex exist on Deleted columns (15 replies)
Hi Sir, Can you please help regarding index. I want to delete millions of records in table and i having indexes on 5 columns out of 8 columns. Is it performance issue causes because of indexes on 5...
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