# Percona XtraDB Cluster **URL:** https://forums.percona.com/c/mysql-mariadb/percona-xtradb-cluster-8-x/37.md?page=2 [Latest](https://forums.percona.com/latest.md) · [Categories](https://forums.percona.com/categories.md) · [Tags](https://forums.percona.com/tags.md) **Page:** 3 --- ## [Why a disk full on a node kill cluster?](https://forums.percona.com/t/why-a-disk-full-on-a-node-kill-cluster/34199)
**Author:** [@Yathus](https://forums.percona.com/u/Yathus)\ **Replies:** 3\ **Last updated:** [July 16, 2025, 3:46pm UTC](https://forums.percona.com/t/why-a-disk-full-on-a-node-kill-cluster/34199 "2025-07-16T15:46:29Z")
Hello I have a cluster with 3 nodes (same hardware). Each night i’m taking backup, i just desync one node, doing mysqldump and resync. Last night, the backup filled all the space, one database growed too much. After … --- ## [Cluster freezes if one node's disk is full](https://forums.percona.com/t/cluster-freezes-if-one-nodes-disk-is-full/15489)
**Author:** [@Oleksandr\_Bezpiatov](https://forums.percona.com/u/Oleksandr_Bezpiatov)\ **Replies:** 3\ **Last updated:** [July 16, 2025, 3:45pm UTC](https://forums.percona.com/t/cluster-freezes-if-one-nodes-disk-is-full/15489 "2025-07-16T15:45:52Z")
Hi, It is not a secret that whole cluster becames frozen in case of any node goes out of disk space. This behavior is described here: \[PXC-1871\] LP #1525300: Whole cluster freezes if one node goes full - Percona JIRA A… --- ## [Percona 8.4 installation documentation](https://forums.percona.com/t/percona-8-4-installation-documentation/38701)
**Author:** [@mikejhathaway](https://forums.percona.com/u/mikejhathaway)\ **Replies:** 2\ **Last updated:** [July 16, 2025, 2:19pm UTC](https://forums.percona.com/t/percona-8-4-installation-documentation/38701 "2025-07-16T14:19:05Z")
Hello Percona Community, I am looking for some guidance on the latest version of Percona, if I visit the docs site to review the installation process for 8.4 which is advertised as the latest, from this page If I hit… --- ## [Does Percona XtraDB Cluster use binlog\_checksum, and can it be safely set to NONE?](https://forums.percona.com/t/does-percona-xtradb-cluster-use-binlog-checksum-and-can-it-be-safely-set-to-none/38643)
**Author:** [@JuanMag](https://forums.percona.com/u/JuanMag)\ **Replies:** 2\ **Last updated:** [July 14, 2025, 8:13am UTC](https://forums.percona.com/t/does-percona-xtradb-cluster-use-binlog-checksum-and-can-it-be-safely-set-to-none/38643 "2025-07-14T08:13:31Z")
Hello, I have a doubt regarding binlog\_checksum in Percona XtraDB Cluster (PXC 8.0.40). By default, Percona (like standard MySQL) uses binlog\_checksum=CRC32. My questions are: Does Percona XtraDB Cluster explicitly r… --- ## [How to grant permission in a Galera Cluster](https://forums.percona.com/t/how-to-grant-permission-in-a-galera-cluster/28942)
**Author:** [@hung\_le](https://forums.percona.com/u/hung_le)\ **Replies:** 11\ **Last updated:** [July 14, 2025, 7:25am UTC](https://forums.percona.com/t/how-to-grant-permission-in-a-galera-cluster/28942 "2025-07-14T07:25:23Z")
Hi all, I have a 3 nodes Mysql(Ver 8.0.35-27.1) Galera Cluster. Im trying to grant permission to a user in Galera Cluster, then it failed and the node that I run the command is down. The command is: GRANT INSERT, UPD… --- ## [Percona server or XtraDB?](https://forums.percona.com/t/percona-server-or-xtradb/38381)
**Author:** [@lbmdkap](https://forums.percona.com/u/lbmdkap)\ **Replies:** 9\ **Last updated:** [July 2, 2025, 6:26am UTC](https://forums.percona.com/t/percona-server-or-xtradb/38381 "2025-07-02T06:26:03Z")
Hello We are looking into migrating our infrastructure including Aurora Clusters and RDS instances from AWS to on-prem, Before we went from on-prem to AWS we had percona clusters running, with simple primary-secondary … --- ## [How to install Percona ProxySQL alongside PXC 8.4 client?](https://forums.percona.com/t/how-to-install-percona-proxysql-alongside-pxc-8-4-client/38418)
**Author:** [@bitone](https://forums.percona.com/u/bitone)\ **Replies:** 5\ **Last updated:** [June 24, 2025, 5:07pm UTC](https://forums.percona.com/t/how-to-install-percona-proxysql-alongside-pxc-8-4-client/38418 "2025-06-24T17:07:16Z")
Hi there, We run the latest PXC cluster 8.4 (not PRO) on three nodes, no issues there. But on a client node, what exactly are the steps to install ProxySQL with the latest PXC client tools? The ProxSQL documentation t… --- ## [MySQL 8.4 + Vault Integration via keyring\_vault – No Logs, Silent Failure](https://forums.percona.com/t/mysql-8-4-vault-integration-via-keyring-vault-no-logs-silent-failure/38356)
**Author:** [@Denis\_Keldanovich](https://forums.percona.com/u/Denis_Keldanovich)\ **Replies:** 10\ **Last updated:** [June 23, 2025, 8:36am UTC](https://forums.percona.com/t/mysql-8-4-vault-integration-via-keyring-vault-no-logs-silent-failure/38356 "2025-06-23T08:36:40Z")
Hello everyone, I’m working on integrating MySQL (Percona XtraDB Cluster 8.4.4-4.1) with HashiCorp Vault using the keyring\_vault component. I’ve successfully used other keyring components in the cluster previously. I’v… --- ## [Restarting server error node rejoins cluster then crashes](https://forums.percona.com/t/restarting-server-error-node-rejoins-cluster-then-crashes/38386)
**Author:** [@stanlip](https://forums.percona.com/u/stanlip)\ **Replies:** 1\ **Last updated:** [June 19, 2025, 2:52pm UTC](https://forums.percona.com/t/restarting-server-error-node-rejoins-cluster-then-crashes/38386 "2025-06-19T14:52:58Z")
Has anyone seen this issue before ? the server completed to sst and allows connections after a few minutes is crashes with this error : 2025-06-18T21:01:30.260384Z 19 \[Note\] \[MY-000000\] \[WSREP\] Synchronized with grou… --- ## [\[Question\] Configuring component\_keyring\_file in Percona XtraDB Cluster 8.4.4 (Debian) — component not activating](https://forums.percona.com/t/question-configuring-component-keyring-file-in-percona-xtradb-cluster-8-4-4-debian-component-not-activating/38079)
**Author:** [@Denis\_Keldanovich](https://forums.percona.com/u/Denis_Keldanovich)\ **Replies:** 5\ **Last updated:** [May 26, 2025, 10:03am UTC](https://forums.percona.com/t/question-configuring-component-keyring-file-in-percona-xtradb-cluster-8-4-4-debian-component-not-activating/38079 "2025-05-26T10:03:33Z")
Hello! I’m trying to configure the keyring as a component (not a plugin) in Percona XtraDB Cluster 8.4.4-4.1 on Debian, following the MySQL 8.4 documentation. The component does not activate, and there are no related er… --- ## [SST Fail site to site](https://forums.percona.com/t/sst-fail-site-to-site/38046)
**Author:** [@fakhri](https://forums.percona.com/u/fakhri)\ **Replies:** 1\ **Last updated:** [May 22, 2025, 12:17pm UTC](https://forums.percona.com/t/sst-fail-site-to-site/38046 "2025-05-22T12:17:05Z")
hello i want to ask about sst percona cluster previously i tried site to site using percona cluster version 8.4 with fresh installation, and it worked, then i tried to provide data from mysql standalone that had been ba… --- ## [No SST with TLS enabled](https://forums.percona.com/t/no-sst-with-tls-enabled/37847)
**Author:** [@mrks](https://forums.percona.com/u/mrks)\ **Replies:** 12\ **Last updated:** [May 8, 2025, 7:07pm UTC](https://forums.percona.com/t/no-sst-with-tls-enabled/37847 "2025-05-08T19:07:03Z")
Hi Percona xtradb users, I just set up my first Percona xtradb cluster using Ubuntu 24.04.2. These packages are currently installed: ii percona-release 1.0-30.generic … --- ## [2 nodes cluster automatic failover](https://forums.percona.com/t/2-nodes-cluster-automatic-failover/37860)
**Author:** [@Samanosuke](https://forums.percona.com/u/Samanosuke)\ **Replies:** 3\ **Last updated:** [May 7, 2025, 2:54pm UTC](https://forums.percona.com/t/2-nodes-cluster-automatic-failover/37860 "2025-05-07T14:54:16Z")
Hello, I know that 2 nodes clusters are not ideal but if I remember correctly with percona 5.7 when one node went down the other one continued to work with 8.0 instead I get this error when I try to read from the db WS… --- ## [Percona XtraDB Cluster 8.0.36 \[Galera\] Failed to apply write set: taking wsrep\_ready to OFF](https://forums.percona.com/t/percona-xtradb-cluster-8-0-36-galera-failed-to-apply-write-set-taking-wsrep-ready-to-off/34372)
**Author:** [@Scott\_Hooper](https://forums.percona.com/u/Scott_Hooper)\ **Replies:** 7\ **Last updated:** [May 6, 2025, 4:39pm UTC](https://forums.percona.com/t/percona-xtradb-cluster-8-0-36-galera-failed-to-apply-write-set-taking-wsrep-ready-to-off/34372 "2025-05-06T16:39:06Z")
We have recently seen this type of error in our various Percona clusters on different nodes. These is the logs from the most recent one. Essentially it sets wsrep\_ready to OFF and then ejects the node from the cluster.… --- ## [PXC8.4.3 nodes crashing intermittently with signal 11](https://forums.percona.com/t/pxc8-4-3-nodes-crashing-intermittently-with-signal-11/37697)
**Author:** [@Neil\_Billett](https://forums.percona.com/u/Neil_Billett)\ **Replies:** 1\ **Last updated:** [April 24, 2025, 11:41am UTC](https://forums.percona.com/t/pxc8-4-3-nodes-crashing-intermittently-with-signal-11/37697 "2025-04-24T11:41:42Z")
Hi, We’re working with a client who has recently upgraded their environment (on our instruction) from PXC8.0.35 to PXC8.4.3. Servers are dedicated 8 core, 128GB RAM running RHEL8.10 and buffer pool on each node is set t… --- ## [PXC8.0.37 Very high thread activity during replication](https://forums.percona.com/t/pxc8-0-37-very-high-thread-activity-during-replication/36850)
**Author:** [@shigaev.s](https://forums.percona.com/u/shigaev.s)\ **Replies:** 12\ **Last updated:** [April 23, 2025, 1:00pm UTC](https://forums.percona.com/t/pxc8-0-37-very-high-thread-activity-during-replication/36850 "2025-04-23T13:00:02Z")
Hello! There is a cluster 8.0.37 of 3 nodes: Server version: 8.0.37-29.1 Percona XtraDB Cluster (GPL), Release rel29, Revision d29a325, WSREP version 26.1.4.3 In front of it is ProxySQL with balancing rules: read/wr… --- ## [MySQL connection issue](https://forums.percona.com/t/mysql-connection-issue/37608)
**Author:** [@Harish\_m.r](https://forums.percona.com/u/Harish_m.r)\ **Replies:** 3\ **Last updated:** [April 15, 2025, 11:40am UTC](https://forums.percona.com/t/mysql-connection-issue/37608 "2025-04-15T11:40:27Z")
Hi Team, A couple of months ago, we migrated our MySQL cluster from version 5.7 to 8.0. We are using a PHP application as the web server and have started noticing that some connections do not occur from the application … --- ## [Xtradb operator - mysql multimaster and replica](https://forums.percona.com/t/xtradb-operator-mysql-multimaster-and-replica/37525)
**Author:** [@Giuseppe\_Miraglia](https://forums.percona.com/u/Giuseppe_Miraglia)\ **Replies:** 9\ **Last updated:** [April 11, 2025, 7:19pm UTC](https://forums.percona.com/t/xtradb-operator-mysql-multimaster-and-replica/37525 "2025-04-11T19:19:36Z")
Good morning Is the procedure in the link below also valid in case of installation of Mysql Multimaster? --- ## [Writes during an online minor upgrade](https://forums.percona.com/t/writes-during-an-online-minor-upgrade/37533)
**Author:** [@doets001](https://forums.percona.com/u/doets001)\ **Replies:** 2\ **Last updated:** [April 8, 2025, 1:30pm UTC](https://forums.percona.com/t/writes-during-an-online-minor-upgrade/37533 "2025-04-08T13:30:06Z")
I have a question regarding an online minor upgrade of a Percona XtraDB Cluster 8.x. The procedure (Upgrade Percona XtraDB Cluster - Percona XtraDB Cluster) indicates that I can perform the upgrade without any special st… --- ## [CVE-2024-5535 patch status?](https://forums.percona.com/t/cve-2024-5535-patch-status/37387)
**Author:** [@tvfan2014](https://forums.percona.com/u/tvfan2014)\ **Replies:** 2\ **Last updated:** [April 7, 2025, 1:52pm UTC](https://forums.percona.com/t/cve-2024-5535-patch-status/37387 "2025-04-07T13:52:23Z")
Hi, I was wondering if someone from Percona side can confirm whether the CVE-2024-5535 has been addressed in Percona XtraDB and if so, which minor version has it, I cannot seem to locate info about it in the release note… --- ## [Read write split on same cloud server](https://forums.percona.com/t/read-write-split-on-same-cloud-server/37494)
**Author:** [@Lars\_Erik\_Dangvard\_J](https://forums.percona.com/u/Lars_Erik_Dangvard_J)\ **Replies:** 3\ **Last updated:** [April 4, 2025, 5:55pm UTC](https://forums.percona.com/t/read-write-split-on-same-cloud-server/37494 "2025-04-04T17:55:01Z")
Having a case with a lot of traffic within 30 minutes, and selects are exploding (5000+ q/s). It’s an old application. If disk I/O can handle it would make sense to make a replica on the same hardware (cloud server with … --- ## [Pxc-db xtrabackup error](https://forums.percona.com/t/pxc-db-xtrabackup-error/36504)
**Author:** [@Anton\_SHumeiko](https://forums.percona.com/u/Anton_SHumeiko)\ **Replies:** 1\ **Last updated:** [April 4, 2025, 3:38pm UTC](https://forums.percona.com/t/pxc-db-xtrabackup-error/36504 "2025-04-04T15:38:10Z")
Hello I get error in time backup cron and manual backup I use pxc-db and percona-operator in kubernetes My helm release config 1.16.1 pxc-db 1.16.1 · percona/percona (1.14 work) unsafeFlags: proxySize: true t… --- ## [Galera parametrs](https://forums.percona.com/t/galera-parametrs/37437)
**Author:** [@stofa.kenida](https://forums.percona.com/u/stofa.kenida)\ **Replies:** 3\ **Last updated:** [April 3, 2025, 10:15am UTC](https://forums.percona.com/t/galera-parametrs/37437 "2025-04-03T10:15:47Z")
Hi, Concerning these two parameters in Galera configuration, evs.keepalive\_period and evs.inactive\_check\_period Looking in Galera documentation the default values for both is PT1S Also, the relation between the two … --- ## [Backup a cluster - beginner questions](https://forums.percona.com/t/backup-a-cluster-beginner-questions/37380)
**Author:** [@Zody](https://forums.percona.com/u/Zody)\ **Replies:** 8\ **Last updated:** [April 2, 2025, 3:16pm UTC](https://forums.percona.com/t/backup-a-cluster-beginner-questions/37380 "2025-04-02T15:16:27Z")
Hey everyone, so we have a production-ready xtraDB Cluster setup and want now to plan how to create and restore backups of it. Actually the setup is a 3 node cluster loadbalanced by a proxysql server. As i can only fi… --- ## [Upgrade from percona 5.7.44 to 8.0.39 will not complete](https://forums.percona.com/t/upgrade-from-percona-5-7-44-to-8-0-39-will-not-complete/37142)
**Author:** [@sgales](https://forums.percona.com/u/sgales)\ **Replies:** 6\ **Last updated:** [March 31, 2025, 8:50pm UTC](https://forums.percona.com/t/upgrade-from-percona-5-7-44-to-8-0-39-will-not-complete/37142 "2025-03-31T20:50:53Z")
Hello, We’ve tried this process a couple of times and all works well, but now we are running into a weird issue where no matter what we do we run into: 2025-03-11T18:03:24.400180Z 3 \[ERROR\] \[MY-011006\] \[Server\] Got err… --- ## [PXC8.4.3 initial memory usage of mysqld process very high compared to PXC8.0.x](https://forums.percona.com/t/pxc8-4-3-initial-memory-usage-of-mysqld-process-very-high-compared-to-pxc8-0-x/36716)
**Author:** [@Neil\_Billett](https://forums.percona.com/u/Neil_Billett)\ **Replies:** 3\ **Last updated:** [March 28, 2025, 5:48pm UTC](https://forums.percona.com/t/pxc8-4-3-initial-memory-usage-of-mysqld-process-very-high-compared-to-pxc8-0-x/36716 "2025-03-28T17:48:53Z")
Hi Folks, We’re moving up from PXC8.0 to PXC8.4 and have noticed that the initial memory usage of the mysqld process in PXC8.4 seems much higher compared to, say, PXC8.0.35. Example running on a 32GB RAM RHEL8.10 serve… --- ## [Migration MariaDB Galera cluster to Percona XtraDB cluster 8.x](https://forums.percona.com/t/migration-mariadb-galera-cluster-to-percona-xtradb-cluster-8-x/37034)
**Author:** [@IgorDmitrenko](https://forums.percona.com/u/IgorDmitrenko)\ **Replies:** 4\ **Last updated:** [March 28, 2025, 4:48pm UTC](https://forums.percona.com/t/migration-mariadb-galera-cluster-to-percona-xtradb-cluster-8-x/37034 "2025-03-28T16:48:46Z")
Hi all. I have a MariaDB (10.7.3) Galera cluster with multiple masters and three nodes and I want to migrate to a Percona XtraDB cluster. What is the easiest way to do this with minimal downtime? --- ## [How to read the checksums table](https://forums.percona.com/t/how-to-read-the-checksums-table/37355)
**Author:** [@rkuijk](https://forums.percona.com/u/rkuijk)\ **Replies:** 2\ **Last updated:** [March 26, 2025, 9:34am UTC](https://forums.percona.com/t/how-to-read-the-checksums-table/37355 "2025-03-26T09:34:57Z")
Hi Everyone, We got a percona mysql cluster and one of these servers has a physical replication to a fourth server. We want to check if the this 4th server matches with the percona cluster. For this we use pt-table-ch… --- ## [Systemctl start hangs for Xtradb 8.0 cluster on Ubuntu 22.04 LTS](https://forums.percona.com/t/systemctl-start-hangs-for-xtradb-8-0-cluster-on-ubuntu-22-04-lts/30942)
**Author:** [@bsabalaskey](https://forums.percona.com/u/bsabalaskey)\ **Replies:** 7\ **Last updated:** [March 21, 2025, 3:08pm UTC](https://forums.percona.com/t/systemctl-start-hangs-for-xtradb-8-0-cluster-on-ubuntu-22-04-lts/30942 "2025-03-21T15:08:46Z")
I am trying XtraDB cluster on a 3 node setup with MySQL 8.0 and intended for WordPress CMS apps. I installed from the normal Percona getting started on Ubuntu using apt install method on Ubuntu 22.04 LTS. When I install … --- ## [PXC load balancing preference and raid question](https://forums.percona.com/t/pxc-load-balancing-preference-and-raid-question/36468)
**Author:** [@xirtam](https://forums.percona.com/u/xirtam)\ **Replies:** 10\ **Last updated:** [March 14, 2025, 6:31pm UTC](https://forums.percona.com/t/pxc-load-balancing-preference-and-raid-question/36468 "2025-03-14T18:31:17Z")
Hello, I’m about to setup a 3 node PXC and wanted to ask 3 quick questions. Does PXC has any built-in balancer? I read about haproxy or sqlproxy everywhere, but I’m wondering if there is a simple balancing integrated … [Previous page](https://forums.percona.com/c/mysql-mariadb/percona-xtradb-cluster-8-x/37.md?page=1) [Next page](https://forums.percona.com/c/mysql-mariadb/percona-xtradb-cluster-8-x/37.md?page=3)