What could cause .frm and .ibd mismatches across multiple tables? (no replies)
Hello, We recently encountered a very strange issue on a production MySQL/MariaDB server and I'm trying to understand what could have caused it. We have a Laravel application. A few days ago we...
View ArticleQuestion about REPEATABLE READ isolatin level. (no replies)
Hey guys, From the description of this isolation level here: https://dev.mysql.com/doc/refman/8.4/en/innodb-transaction-isolation-levels.html, it says 'It is not recommended to mix locking statements...
View ArticleInnoDB Table - Instant Add Column taking a long time (no replies)
I've a MySQL table, which I'm having trouble to add a column using instant algorithm. There is no error when I run the DDL, but it runs forever. Type: InnoDB MySQL Version: 8.0.35 (Hosted on OVH MySQL...
View ArticleUndo logs Bloat (no replies)
we are experiencing a huge undo log bloat in the mysql version 8.0.40 size of the undo log files grown 580G temp_undo_003.ibu 102G temp_undo_004.ibu 521G undo_001 575G undo_002 History list length...
View ArticleMYSQL table end not ready? (no replies)
Hi! I am creating an SQL table in a PHP program. The program runs fine, the data is written to a .cs file as well, there are no error messages, but the end of the SQL table is missing. Is there a...
View ArticleMySQL 8.4.3 – Transactions stuck in waiting for handler commit until restart...
We are experiencing an intermittent but severe commit stall in MySQL 8.4.3 Community Edition (RHEL-compatible OS) running asynchronous master–master replication. Symptoms: Many client sessions remain...
View ArticleHow recovery data in ibdata1 file? I truncate tables, but i need to recovery...
Help!!!! I'm using mysql 5.1 and was executed a truncate table in all tables of database!!! I made the backup as soon as the command was executed and I can see the data using a text editor in the...
View ArticleInnodb: join of large table to small table is slow if small table has less...
I happened to read this post https://forums.mysql.com/read.php?22,620920,620920#msg-620920 of 2014 and I tried and confirmed that it could even be reproduced now in 2024. I wonder if there's any...
View ArticleInnodb_dict_tables metric - how to access it? (no replies)
Hi everyone, I'm currently working on monitoring our Percona XtraDB Cluster using LogicMonitor. Most of the basic MySQL metrics are being collected without any issues. However, I'm having trouble with...
View ArticleUpdate of innodb_buffer_pool_instances (no replies)
Dear Team, We are using MySQL 8.0.37 community version and want to update innodb_buffer_pool_instances and other variable too to increase the performance. I edited the my.ini to add entry for...
View ArticleHow to debug very slow transactions stuck at "waiting for handler commit"...
- My MySQL Setup: I have a production MySQL 8.0.33 database. All tables use the InnoDB storage engine. The database has been running smoothly for the last 9 months. Size: ~60GB of data and ~200...
View Article[GCP Cloud SQL MySQL Upgrade Error] InnoDB Metadata Inconsistency - Unable to...
Hi everyone, We're facing a critical issue during a MySQL upgrade (from version 5.7 to 8.0) on a Google Cloud SQL instance. The upgrade process fails due to metadata inconsistencies in InnoDB, and...
View ArticleMySQL 8.4.2 MY-013935 IO-layer timeout before wait_timeout was reached. (no...
Hello, we used MySQL 5.7.35 + java 17 web application with connector mysql-connector-j-8.2.0. Application is on different host and running on Windows platform. Database is running on Windows as well....
View ArticleDeadlock (no replies)
A couple of days ago this deadlock happened on our MySql 5.7 database: ------------------------ LATEST DETECTED DEADLOCK ------------------------ 2024-09-25 11:03:39 0x14b52a06b700 *** (1)...
View ArticleEnhancing MVCC ReadView Scalability (4 replies)
The MVCC ReadView uses a vector to store the list of active transactions. In high-concurrency scenarios, this list can become large, leading to a larger working set. In NUMA environments, both...
View ArticleMySql 5.7 wrong (apparently) value of character_maximum_length (2 replies)
Hi I am trying to analyze a table structure, to understand why ALTER TABLE operations take so long time. My attention comes to longtext and mediumtext columns. One of them, though, has a strange clue...
View ArticleMySQL execute plan behaves different in Master and Slave (no replies)
I have one MySQL query, and that query is using an index on the master but not using an index on the slave. The query is as simple as SELECT * FROM table1 JOIN table2 ON table1.primary_id =...
View ArticleDelete With JSON Filling /tmp Space (no replies)
MySQL 8.0.37 statement: DELETE FROM table WHERE datefield<'date'; table has 6 int, date, timestamp, and short (<32) varchar fields and 1 LARGE JSON field. Deleting 2500 records is filling 800M...
View ArticleInnodb 5.7 include and failover to new member (no replies)
Hello Guys, I am fresh in Mysql innodb and I am in charge to include a new member on the Innodb Cluster and after that promote it to master ( R\W ). However, It is a production Environment and I...
View ArticleTemu Coupon Code [ACP856709]: Get Flat $100 OFF + 30% Discount (no replies)
Look no further than Temu, the e-commerce sensation that's taking the world by storm! I'm thrilled to share with you the latest Temu coupon codes that will supercharge your savings. Let's dive into...
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