what is the best full-text search engine that can be combined with MySQL 5.6...
Dear everyone, Since mysql's full-text search engines are difficult to support big data's full-text searching, then what is the best full-text search engine that can be combined with MySQL 5.6...
View ArticleCreating sort index cause shared lock (2 replies)
We have a large query to select some records on a single table. In running the application, it caused deadlock with some other update statement on the same table occasionally. In the deadlock...
View Articleinnodb_read_io_threads and innodb_buffer_pool_instances (1 reply)
We can define multiple innodb_buffer_pool_instances. I want to know if each innodb_buffer_pool instance has its own innodb_read_io_threads For example, set innodb_read_io_threads = 10,...
View ArticleCorrupted Magento InnoDB Recovery (no replies)
Below is outlined my plan to restore the MySQL DB on our Production server that has gotten a corrupted InnoDB file. 1. Create TAR archive of /lib/mysql Code: tar –zcvf mysql-data-dir.tar.gz /lib/mysql...
View ArticleDELETE very large table (1 reply)
I have InnoDb table of 50 Gb and more 100M records. The table is oldest. The MySQL server is production and very loaded. How I can effective delete table without locking database.
View ArticleInnoDB: cannot open table after system re-install (W10) (no replies)
Hello Had a Windows system crash and I had to reinstall everything from scratch. I keep MySQL version identical (5.6). I have downloaded the folder Program Data/MySQL from my backup and re-install...
View ArticleInnoDB limitation in respect to Lower and Upper case (no replies)
Hi, I am using MyIsam v5.6 database using Match and Against. But now we move to InnoDB database v5.6. Does InnoDB has limitation in respect to Lower and Upper case when using Indexes with Match and...
View ArticleWhen need to increase table_open_cache (1 reply)
Always see some post and some tuning tool said if Opened_tables is large and increase fast, it's time to increase table_open_cache. But also see other posts that when create tmp tables also will...
View ArticleBug in HAVING COUNT? (1 reply)
Using MySQL Community 5.6.22 and InnoDB. Trying to run SQL that looks like: CREATE VIEW CustStyles AS SELECT C.CustomerID, C.CustFirstName, C.CustLastName, MS.StyleName FROM Customers AS C INNER JOIN...
View ArticleInnoDB Memory configuration - basic (1 reply)
Hi All My apologies for this very basic question, but I'm lost ... I have assigned 40GB Memory as innodb_buffer_pool_size , but no matter what I do, MySQL takes no more then around 11 to 12 GB of...
View ArticleMySQL locking in Duplicate Key Error (2 replies)
From Docs : Suppose that an InnoDB table t1 has the following structure: CREATE TABLE t1 (i INT, PRIMARY KEY (i)) ENGINE = InnoDB; Now suppose that three sessions perform the following operations in...
View ArticleMysql database size when exported (1 reply)
Hello All, This is my first post, I have a question about calculating MYSQL database size, when I queries the database runs on Amazon RDS for the size it was 611 Gig, however when I started the export...
View ArticleOffset on index details (2 replies)
I have the following table (InnoDB): CREATE TABLE Things ( id INT NOT NULL PRIMARY KEY, cat INT NOT NULL, content TEXT, INDEX CatId (cat, id) ) The CatId index is used When making the following query...
View ArticleMySQL error: Incorrect key file for table...
Hi MySQL experts, I'm using Sequel Pro 1.1.2 Build 4541 (602e11a). I added two columns using a stored procedure by doing mathematical operations on a column in the same table as well as on a column in...
View ArticleMySQL create table in database information_schema (1 reply)
Hi, Anyone can give on how to create a table on MySQL database information_schema? use information_schema; CREATE TEMPORARY TABLE `TEST` ( `TEST_DESC` varchar(512) NOT NULL DEFAULT '',...
View ArticleInnoDB B+ tree index - duplicate values (no replies)
How are duplicate keys handled in InnoDB's implementation of B+ tree for it's indexes. For example, if there is a table with 1 million rows having a column with cardinality of 10. If we create an...
View ArticleSet Utc_timestamp() As Default Date field value (1 reply)
How can i set Default date field value as utc_timestamp() while creation of table..?? For Example Create table table1(date datetime default Utc_Timestamp())
View Articlealter table with online (1 reply)
Hi, A table is very big size. I want to alter table defineition several times. But It takes too long to serve the services. When I add some columns or charge some columns. What is the best way? data...
View ArticleWhat index works best? (2 replies)
I have a table with some 10 million records, I wonder whether it is better to index field by field or concatenate the fields? example: Columns code, name, type, create an index for each column or an...
View ArticleRecovery (5 replies)
Hey all. Been struggling for 24 hours. mysql crashed on my server during the night. Not sure why. 2gb of Ram and small websites. 250mb swap on my vps. I did a clean install on my centos 7 system of...
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