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January 28, 2026
Databases, Data Lakes, And Encryption
The Evolution of Object Storage Let’s start by stating something really obvious; object storage has become the preeminent storage system [...]
January 27, 2026
Automatic “Multi-Source” Async Replication Failover Using PXC Replication Manager
The replication manager script can be particularly useful in complex PXC/Galera topologies that require Async/Multi-source replication. This will ease the [...]
November 5, 2025
Surprise with innodb_doublewrite_pages in MySQL 8.0.20+
In a recent post, The Quirks of Index Maintenance in Open Source Databases, I compared the IO load generated by [...]
June 20, 2025
MySQL Orchestrator Failover Behavior During Replication Lag
Managing farms of MySQL servers under a replication environment is very efficient with the help of a MySQL orchestrator tool. [...]
March 3, 2025
Compression Methods in MongoDB: Snappy vs. Zstd
This post was originally published in March 2023 and was updated in March 2025. When it comes to optimizing MongoDB, [...]
August 14, 2024
Effective Strategies for Recovering MySQL Group Replication From Failures
Group replication is a fault-tolerant/highly available replication topology that ensures if the primary node goes down, one of the other [...]
March 28, 2023
WiredTiger Logging and Checkpoint Mechanism
In this blog post, we will dive deep into WiredTiger’s Logging and Checkpoint mechanism. Every database system has to ensure [...]
February 15, 2023
How Bloom Filters Work in MyRocks
Bloom filters are an essential component of an LSM-based database engine like MyRocks. This post will illustrate through a simple [...]
February 10, 2023
Percona XtraBackup and MySQL 5.7 Queries in Waiting for Table Flush State
Percona XtraBackup is an open source hot backup utility for MySQL-based servers. To take consistent and hot backup, it uses [...]
January 9, 2023
COUNT(*) vs COUNT(col) in MySQL
Looking at how people are using COUNT(*) and COUNT(col), it looks like most of them think they are synonyms and [...]
December 23, 2022
A MyRocks Use Case
I wrote this post on MyRocks because I believe it is the most interesting new MySQL storage engine to have [...]
August 17, 2022
MyRocks Use Case: Big Dataset
One of the questions I am often asked is in what cases I would prefer MyRocks over InnoDB. We have [...]
August 10, 2022
Building Percona Server for MySQL 8.0 with RocksDB Storage Engine on macOS
In Percona Server for MySQL 8.0.29-21, we added one more patch that helps us to build server code on macOS. To [...]
January 7, 2022
Configure wiredTiger cacheSize Inside Percona Operator for MongoDB
Nowadays we are seeing a lot of customers starting to use our Percona Operator for MongoDB. The Percona Operators are [...]
December 30, 2021
MongoDB Config Server Upgrade From SCCC to CSRS ReplicaSet
Recently, I got some of our customers doing an upgrade to v4.x from v3.0 (Yeah, still could see older MongoDB [...]
November 22, 2021
Temporary Tables in MySQL – Never Ending Story?
If you ever had to deal with performance and/or disk space issues related to temporary tables, I bet you eventually [...]
October 6, 2021
Reminder: TokuDB Storage Engine Will Be Disabled by Default in Percona Server for MySQL 8.0.26
As we’ve communicated in our blog post in May, the TokuDB Storage Engine has been marked as “deprecated” in Percona [...]
June 22, 2021
WiredTiger File Forensics Part 3: Viewing all the MongoDB Data
This article continues on from Part 1: Building “wt” and “Part 2: wt dump” to show how to extract any [...]
June 7, 2021
Experimental Feature: $backupCursorExtend in Percona Server for MongoDB
Percona Server for MongoDB (PSMDB) has provided a ‘hot’ backup of its underlying data db directory files using WiredTiger library [...]
May 27, 2021
How InnoDB Handles TEXT/BLOB Columns
Recently we had a debate in the consulting team about how InnoDB handles TEXT/BLOB columns. More specifically, the argument was [...]