Optimistic locking/Repeatable read (3 replies)
There doesn't appear to be a forum for asking questions like this. We use repeatable read. I'd like to do optimistic locking, as in: update foo set version = version + 1, ... where version =...
View ArticleERROR 1210 (HY000): Incorrect arguments to MATCH (1 reply)
Query does full text search on tables. Runs fine with MyISAM table. When tables are converted to Innodb , same query returns error ERROR 1210 (HY000): Incorrect arguments to MATCH. Rebuild full text...
View ArticleCpu and Memory Utilization (no replies)
How do we find the exact CPU and Memory when a query is executed. I am using mysql 5.7.20 community version. I am able to get the CPU details only for session level by setting SET profiling=1. How do...
View ArticleBarracuda compression (no replies)
The documentation stats "When compression is working well for a data set, the size of the InnoDB data files (the .idb files) is 25% to 50% of the uncompressed size or possibly smaller.". Isn't the...
View Articlecan someone make this to .sql file ? (1 reply)
SQL_TVoid(g_dDatabase, "CREATE TABLE IF NOT EXISTS `store_players` (\ `id` int(11) NOT NULL AUTO_INCREMENT,\ `authid` varchar(32) NOT NULL,\ `name` varchar(64) NOT NULL,\ `credits` int(11) NOT NULL,\...
View ArticleDifferent "Fetch Time" for Same Query with Diff Indexes (1 reply)
Hi There I an using MySQL 5.7.20 with my schema on InnoDB engine. My schema four tables: 1. "Collections_history" with approx 60 Million Records 2. "Attribute" with 6 records 3. "Attribute_grp" with 6...
View ArticleSlow DELETE-Statement since update on 5.7 (no replies)
I have a MySQL 5.7 server with a table MEDIADATA with 2000 rows that contains one longblob: `MEDIADATA` ( `id` bigint(20) NOT NULL, `version` bigint(20) NOT NULL, `crc32sum` bigint(20) NOT NULL,...
View ArticleHow to convert from Antelope to Barracuda file format? (5 replies)
OS: linux MySQL Version: 5.6.38 I am trying to install an application (Moodle 3.4) that requires the Barracuda file format. My db has tables using Antelope file format. I do not have access to enable...
View ArticleShutdown Time variable (no replies)
How can we identify service shutdown time in mysql community version 5.7.20. I presume that "statement/sql/shutdown" and "statement/com/Shutdown" are the events that occurs while shutdown a service,...
View ArticleHow to convert from Antelope to Barracuda file format? (5 replies)
OS: linux MySQL Version: 5.6.38 I am trying to install an application (Moodle 3.4) that requires the Barracuda file format. My db has tables using Antelope file format. I do not have access to enable...
View ArticleHow do you handle unknown POINT values in MySQL? (no replies)
MySQL 5.7 introduced Spatial Indexes on POINT columns. Apparently, you cannot have NULL values in a spatial index. At the same time, you cannot use a DEFAULT for POINT columns. So how do you handle...
View ArticleWarning: a long semaphore wait (no replies)
I am getting below error in error log InnoDB: Warning: a long semaphore wait: --Thread 47095778944768 has waited at btr0cur.cc line 536 for 241.00 seconds the semaphore: X-lock (wait_ex) on RW-latch...
View Articlehow to convert the hex of the output of a deadlock to decimal (1 reply)
hi, there was a deadlock when i did a test on linux ,i know the filed 0(hex 8003d370) means primary key's value and filed 4 means c's value,but how i convert them to decimal or characters? | sbtest9 |...
View Articleibdata1 keeps growing forever.... (1 reply)
Good day to everyone I have an Ubuntu server (10.04) with mysql (5.1) The machine is running a nagios / OPSView monitor application so I can monitor various services/servers/networks etc. Its been a...
View Articledisable undo buffer for delete query (no replies)
hi can I disable undo buffer for DELETE query? I don't see a point for rollbacking delete query when it fails, I want to delete the data even if the query fails halfway I accidentally run delete query...
View ArticleHIgh cpu utilization (no replies)
I am using mysql community edition 5.7.20. From past two days my cpu utilization is 150 to 200 % but the connected users are three, in which two are users connected from client side and other one is...
View ArticleMySQL 8.0: Instant ADD COLUMN for InnoDB (no replies)
MySQL 8.0: Instant ADD COLUMN for InnoDB https://mysqlserverteam.com/mysql-8-0-innodb-now-supports-instant-add-column/
View ArticleMySQL 8.0: InnoDB Introduces LOB Index For Faster Updates (no replies)
https://mysqlserverteam.com/mysql-8-0-innodb-introduces-lob-index-for-faster-updates/
View ArticleGot signal 11 (no replies)
I use mysql-community-5.7.20-glibc in redhat6.9 with group replication; when I exec insert into mytable select * from othertable;(the table size is about 10 million) I got signal 11: 06:59:18 UTC -...
View Articlerecover partitioned table (no replies)
Environment: RHL 7, MySQL 5.7.15 What happened: Accidentally deleted all the .idb files of a partitioned table. The database did not start up on restart. Add "innodb-force-recovery=1" to my.cnf,...
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