find MASTER_LOG_POS in binary log (no replies)
Hi, i have lvm backup of my mysql DB, and i like to use this backup for slave in a master slave configuration. Is it correct to use the last finding of end_log_pos in the binlog for the setup of the...
View ArticleMaster-Slave (3 replies)
I have a master-slave setup, which was running fine with out any issues. 3 days back i have loaded close to 1 TB data in Master DB, since then Slave is having issues and i can see the errors like in...
View ArticleSQL to delete data in JSON (no replies)
Hi, Could you please how to delete data from JSON. below is the sample JSON data which I want to delete. Example: in this data, what is the delete sql to delete record related to...
View ArticleInstalling different version of mysql in same server. (1 reply)
Hello everyone, I am Sreekanth my operating server is Centos 7 running with Mysql 5.7.20,my client requirement is to install Mysql 5.6.40 version in the same server. I tried installing manually by...
View ArticleMySQL query suck in NULL state (1 reply)
Hello, I'm using Oracle MySQL 5.6.26, Running the query which stuck in the "NULL" state. Time to time it changes the state to "Opening tables" and then back to "NULL" state. Have tried to double size...
View ArticleBuffer Pool Instances Doesn't Work (no replies)
I have a new standalone Windows 10 installation. I've changed the buffer pool instances through SET PERSIST innodb_buffer_pool_size = 8589934592; (8 Gb) SET PERSIST_ONLY innodb_buffer_pool_instances =...
View ArticleIs there any command to flush innodb buffer pool manually? (1 reply)
Is there any command to flush innodb buffer pool manually?
View ArticleIssues with alter table InnoDB (1 reply)
System-specs: -- MySQL Version 9.10 Distrib 5.5.60 -- CentOS Linux release 7.5.1804 (Core) -- innodb_file_per_table Problem: table status of some innodb tables shows "data_free=4194304". optimize...
View ArticleTransaction Deadlock Fixed with Composite Index - but why? (3 replies)
I encountered a transaction deadlock issue that occurred when two transactions were both trying to do a large set of UPDATEs. Each individual UPDATE in each transaction was only for a unique row so...
View ArticleDELETE from table does not delete rows (1 reply)
Hi, I ran into a very strange situation: a cron job runs every night and is supposed to delete form old data from a table. It turns out that for a few weeks now the query runs, takes a lot of time (as...
View ArticleRunning queries across different shards in Mysql 8 (no replies)
Hi, I have an application where I will definitely to shard. We are collecting gps location of vehicles every 10 seconds. Thus we cant run on a single machine for few thousand vehicles. Thus we could...
View ArticleError column longtext (1 reply)
Hi everyone, I have an innodb table with about 25 longtext fields, but during data entry I get the Row size too large error (> 8126). The error is resolved if I use myisam for the table, but I...
View Articlehelp with recommending hardware for mysql db running innodb engine (no replies)
I have a moderate to high busy mysql database server (in terms of read and writes). We are having some performance issues. Trying to figure out where might be the bottlenecks. Database definitely has...
View ArticleVIEWS WITH PARAMETERS (no replies)
This is a simple solution to improve the problem of slow VIEWS with multiple joins queries between multiple tables. DELIMITER ;; CREATE PROCEDURE `SP_QUERY_VIEW_WITH_PARAMETERS`(IN p_having...
View Articlequery by first occurrence in group (4 replies)
With a table with 2 fields as: sector, number, matriculate doct 2 A doct 5 B doct 5 C info 0 D info 1 E info 4 F info 4 G tech 2 H tech 3 I I want extract for every sector, which has maximum "number",...
View Articlerisk for innodb_flush_method=nosync (1 reply)
Hi, The msqld on my Linux is busy with hight disk overhead. So I want to know, can I use innodb_flush_method=nosync to descrease disk overhead. I have replication for mysqld on the other Linux without...
View Articlemysql 5.6.26 high concurrency dead lock (1 reply)
table struce: CREATE TABLE `extend_0` ( `id` bigint(20) NOT NULL, `code` varchar(30) NOT NULL, `data_key` varchar(50) NOT NULL, `data_value` varchar(200) NOT NULL, `create_time` timestamp NOT NULL...
View ArticleIssue InnoDB cluster + Encrypted tables (TDE) - keyring_okv (no replies)
Hello, I'm having an issue with my encrypted tables and my innodb cluster and keyring_okv. If my tables is Encryption='Y' and I restart mysqld on a slave server, the slave server can't find the master...
View ArticleMysql 8 group replication sync problem (no replies)
I have mySQL 8.0.16 with a Innodb cluster configured with 3 servers. I backed up a DB with mysql dump, removed the database and created a new database, and tried reimported the database again from sql...
View Articlewhich is better ? (no replies)
which is better for recovery and to avoid crashes InnoDB or MYISAM storage engine.?
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