Restore data from table (InnoDB) (4 replies)
Hello, I'm new here and hope someone is capable to help. Somehow I'm missing data from a table. I've just delete one datarow and now all data are missing. Select * result = empty. But I think the data...
View ArticleStrange issue with count(*) with where clause (1 reply)
I don't know that this is InnoDB related, but it's as good a place as anywhere to start. Background: MySQL 5.6.35 Community edition All default MySQL settings except: innodb_file_per_table=1...
View ArticleInseret records from one table to many (3 replies)
I have a table called t_csv. csv_id category parent_category product generic 1 Unanai Unanai-parent Unanai-prod gen-1 2 Aqu Aqu-parent Aqu-prod gen-2 3 Afga Afga-parent Afga-prod gen-3 4 Indana...
View ArticleLock wait timeout exceeded when redo log switch was happening. (no replies)
Hi, We are getting Lock wait timeout exceeded from an SP inserting records not much less than 100 rows. I found that there was log rotation happened at the same time. Normally it takes few seconds to...
View ArticleDead lock happening when using update query (1 reply)
i am having a scenario where one table gets frequent update where data structure like this.. Column1 Column2 Column3 1 2 a 2 1 b 3 2 m 2 3 m based on the column 1 and column 2 included in where...
View ArticleBinlog event ordering guarantee. (no replies)
Hello, I'm using MySQL 5.6.13-log with the following flags: binlog_format = MIXED tx_isolation = READ-COMMITTED binlog_rows_query_log_events = ON Also, with the help of the...
View ArticleIs virtual generated column also gets added to row_size of the table (no...
Hi, I am using MySQL version '5.7.11-log' for a specific project requirement I am trying to create virtual generated columns in a innodb table. one of the innodb tables here requires some thing like...
View ArticleInnodb index change crash db (no replies)
I have a server with 32Gb rams in it. I have given almost 70% innodb buffer pool to it. I have table with almost 40 millions data in it. Recently I tried to remove of the index and I tried to replace...
View ArticleUpdate... WHERE not same result as SELECT (4 replies)
Hi, When I execute the following SQL I get a result of 1 record found select COUNT(*) FROM T_Porte WHERE Territoire=10 and Rue='Ch Clément N' and Ville='St-Justin' and Porte=990 and Appartement='';...
View ArticleTable Data Deleted Autometically (Urgent) (no replies)
I am using MySQL 5.x version and my DB is 12GB. Recently i am facing a problem that some table data deleted automatically. I also notice that not all table doing this. Only 4/5 table doing this...
View ArticleGetting error for non-existent DB "InnoDB: Could not find a valid tablespace...
Hi My MySQL Server stops every couple of hours or so and the Err Log shows this error: 2017-05-09 09:37:53 25544 [ERROR] InnoDB: Could not find a valid tablespace file for 'crl2014/wp_cf7dbplugin_st'....
View ArticleSelect count very slow (2 replies)
Hi, I'm using mysql 5.7 on ubuntu server 14.04, and engine innodb. I have a table that are very huge (about 66 Go), I insert and delete from it without problem, but some query of select are taking lot...
View Articlenot able to get rows using indexed join columns (no replies)
Hi Sir,Madam, I am trying to retrieve data based on two tables(w01 ,wu_02). it is hanging and not able to get count(*) results for 1 hr also, kindly help me on this. I have provided both table...
View ArticleInnoDB file release after delete (no replies)
Hi, We're usinng Mysql 5.7, and the normal database location is on the server's SSD drive. We have daily data in separate tables (1 table per day). Since the SSD is only 1 TB, we need to move older...
View Articlemysql5.7.16 crashed twice in 4 days (no replies)
server:Intel E5 48 Cores,256GB memory(system used 180GB before crashed), 8T disk version:mysql Ver 14.14 Distrib 5.7.16, for Linux (x86_64) OS:redhat7.2 the error-logs and my.cnf as follows:...
View ArticleMySQL Group Replication - does read only operations supported for...
Please consider the following topology of some organization, consisting of 4 branches (A,B,C,D). All branches are located in different geo locations and interconnected with VPN. This organization...
View ArticleMysql crash - innodb problem ? (no replies)
Hi here, I have a problem on my mysql server : ## 2017-06-02 20:07:06 5039 [Note] Plugin 'FEDERATED' is disabled. 2017-06-02 20:07:06 5039 [Note] InnoDB: Using atomics to ref count buffer pool pages...
View ArticleBulk Insert (no replies)
Hi, I am using MYSQL community edition 5.6 with INNODB storage engine. Everyday there is a bulk insert of approximate 300-600gb data in one table. What are best possible ways to insert data in minimum...
View Articlehigh concurency issue with read-write on mysql table (no replies)
I have a mysql innoDB table (mysql 5.7, ubuntu 14.04) : <code> +-------------------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra |...
View ArticleHigh concurrency for master and high reading from slave slowing down insert...
Hi All, I am having a system which receive data from around 30K gps . Each unit will be inserting concurrently around 1 minute. 1.What tweak should I add to cater for this? I target my ram to be 48Gb...
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