# General Questions **URL:** https://forums.percona.com/c/general-questions/6.md?page=4 [Latest](https://forums.percona.com/latest.md) · [Categories](https://forums.percona.com/categories.md) · [Tags](https://forums.percona.com/tags.md) **Page:** 5 --- ## [multiple slaves error: bogus data in log event](https://forums.percona.com/t/multiple-slaves-error-bogus-data-in-log-event/5368)
**Author:** [@jcanete](https://forums.percona.com/u/jcanete)\ **Replies:** 2\ **Last updated:** [April 1, 2017, 2:37am UTC](https://forums.percona.com/t/multiple-slaves-error-bogus-data-in-log-event/5368 "2017-04-01T02:37:47Z")
hello, we have one master and two slaves and as soon as the slaves start to replicate, we get this error in one slave only (the other keeps running): Last\_IO\_Error: Got fatal error 1236 from master when reading data fro… --- ## [pt-table-checksum alternatives](https://forums.percona.com/t/pt-table-checksum-alternatives/5467)
**Author:** [@mareksogi](https://forums.percona.com/u/mareksogi)\ **Replies:** 4\ **Last updated:** [March 30, 2017, 1:40am UTC](https://forums.percona.com/t/pt-table-checksum-alternatives/5467 "2017-03-30T01:40:40Z")
Hey all. We are in need of tool, which will be checking replication data for consistency. This tool would be great, but its limitation is ROW/MIXED based replication doesn’t work… Do you guys have any idea of possible … --- ## [Installation problems using the guide from Percona](https://forums.percona.com/t/installation-problems-using-the-guide-from-percona/5489)
**Author:** [@twelvell](https://forums.percona.com/u/twelvell)\ **Replies:** 1\ **Last updated:** [March 17, 2017, 3:30pm UTC](https://forums.percona.com/t/installation-problems-using-the-guide-from-percona/5489 "2017-03-17T15:30:03Z")
Dear community, I am experiencing problems to install the Percona 5.7 on my Debian 8.7. I used this guide: \[URL=“Installing Percona Server for MySQL on Debian and Ubuntu — Percona Server 5.7 Documentation”\]https://www.… --- ## [How to tune tokuDB query with "sort by"](https://forums.percona.com/t/how-to-tune-tokudb-query-with-sort-by/5455)
**Author:** [@changmao.wang](https://forums.percona.com/u/changmao.wang)\ **Replies:** 0\ **Last updated:** [March 2, 2017, 5:23am UTC](https://forums.percona.com/t/how-to-tune-tokudb-query-with-sort-by/5455 "2017-03-02T05:23:32Z")
I have single table query with order by clause. The execution plan of this query is as below: mysql\> explain select barTime,dataDate,closePrice,shortnm from MarketDataTDB.equity\_pricemin where datadate \>= 20170103 and d… --- ## [mydumper Compression Issue](https://forums.percona.com/t/mydumper-compression-issue/5352)
**Author:** [@LostInTheWoods](https://forums.percona.com/u/LostInTheWoods)\ **Replies:** 0\ **Last updated:** [January 18, 2017, 7:18am UTC](https://forums.percona.com/t/mydumper-compression-issue/5352 "2017-01-18T07:18:09Z")
Hi, My understanding is that Percona are now maintaining the mydumper project, so I hope it is OK to ask a mydumper question here. I am running CentOS 6.8 and I have compiled mydumper from source. But when I try to use … --- ## [Upgrading MySQL 5.6 to higher versions when GTID replication is enabled](https://forums.percona.com/t/upgrading-mysql-5-6-to-higher-versions-when-gtid-replication-is-enabled/5131)
**Author:** [@mail2virtusolabs](https://forums.percona.com/u/mail2virtusolabs)\ **Replies:** 2\ **Last updated:** [October 19, 2016, 9:03am UTC](https://forums.percona.com/t/upgrading-mysql-5-6-to-higher-versions-when-gtid-replication-is-enabled/5131 "2016-10-19T09:03:10Z")
Hi, I need your help on proceeding MySQL upgrade when GTID is enabled on Oracle Enterprise MySQL servers, Below are the couple of details topology one master having 3 slaves Current Version : 5.6 Consideration: upgrad… --- ## [Tuning/optimization of "SHOW FULL TABLES" and "SHOW FULL COLUMNS"](https://forums.percona.com/t/tuning-optimization-of-show-full-tables-and-show-full-columns/5150)
**Author:** [@holala](https://forums.percona.com/u/holala)\ **Replies:** 0\ **Last updated:** [October 14, 2016, 8:55am UTC](https://forums.percona.com/t/tuning-optimization-of-show-full-tables-and-show-full-columns/5150 "2016-10-14T08:55:27Z")
Hello, we’re experiencing issues with excessive SHOW FULL TABLES and SHOW FULL COLUMNS statements after upgrading to latest version of Hibernate. Is there any way to tune or optimise MySQL/Percona to improve performance… --- ## [Delete many rows from a large percona mysql db](https://forums.percona.com/t/delete-many-rows-from-a-large-percona-mysql-db/5080)
**Author:** [@An\_An](https://forums.percona.com/u/An_An)\ **Replies:** 0\ **Last updated:** [September 14, 2016, 5:50am UTC](https://forums.percona.com/t/delete-many-rows-from-a-large-percona-mysql-db/5080 "2016-09-14T05:50:05Z")
Hello, I need a fresh opinion on the case. Any thoughts are appreciated. Input: we have a huge percona mysql (5.5) database that takes a couple of Tb (terabytes). Tables on innodb engine. More than a half (2/3) of tha… --- ## [MySQL query sometimes runs slow, sometimes fast](https://forums.percona.com/t/mysql-query-sometimes-runs-slow-sometimes-fast/4769)
**Author:** [@zangetsKid](https://forums.percona.com/u/zangetsKid)\ **Replies:** 3\ **Last updated:** [July 8, 2016, 12:03am UTC](https://forums.percona.com/t/mysql-query-sometimes-runs-slow-sometimes-fast/4769 "2016-07-08T00:03:57Z")
Hi, I am having problem with this simple MySQL query: select sender as id from message where status=1 and recipient=1 where sender table has multi millions of rows. When I run this on SequelPro, it runs really slow … --- ## [Getting error while placing cold backup in linux server having mysql](https://forums.percona.com/t/getting-error-while-placing-cold-backup-in-linux-server-having-mysql/4880)
**Author:** [@Avdhesh\_Sharma](https://forums.percona.com/u/Avdhesh_Sharma)\ **Replies:** 0\ **Last updated:** [May 6, 2016, 4:59am UTC](https://forums.percona.com/t/getting-error-while-placing-cold-backup-in-linux-server-having-mysql/4880 "2016-05-06T04:59:04Z")
I am trying to migrate data from mysql 5.6 hosted in windows to mysql 5.7 in linux.I had taken cold backup and trying to put data folder and getting below error, 2016-05-06T10:09:57.280800Z 0 \[ERROR\] InnoDB: Space ID in… --- ## [Major difference between MEB and Percona Xtrabackup](https://forums.percona.com/t/major-difference-between-meb-and-percona-xtrabackup/4749)
**Author:** [@tvr](https://forums.percona.com/u/tvr)\ **Replies:** 2\ **Last updated:** [March 15, 2016, 6:50am UTC](https://forums.percona.com/t/major-difference-between-meb-and-percona-xtrabackup/4749 "2016-03-15T06:50:45Z")
Can some one let me know what is the major difference between the MEB and the Percona Xtrabackup , i am in process of using the Percona Xtrabackup --- ## [mysql 5.5 bad query plan](https://forums.percona.com/t/mysql-5-5-bad-query-plan/4683)
**Author:** [@jsvishal](https://forums.percona.com/u/jsvishal)\ **Replies:** 0\ **Last updated:** [January 25, 2016, 2:28pm UTC](https://forums.percona.com/t/mysql-5-5-bad-query-plan/4683 "2016-01-25T14:28:28Z")
\[TABLE\] \[TR\] \[TD=“class: votecell”\] \[CENTER\]0down votefavorite \[/CENTER\] \[/TD\] \[TD=“class: postcell”\]I am using mysql 5.5 with innodb. I ran into an issue where one particular query suddenly started using sub opti… --- ## [mysql service Not starting ( Percona xtradb cluster configured )](https://forums.percona.com/t/mysql-service-not-starting-percona-xtradb-cluster-configured/4628)
**Author:** [@rameshit](https://forums.percona.com/u/rameshit)\ **Replies:** 0\ **Last updated:** [December 23, 2015, 5:24am UTC](https://forums.percona.com/t/mysql-service-not-starting-percona-xtradb-cluster-configured/4628 "2015-12-23T05:24:34Z")
hi all, we are using percona xtradb cluster on centos , we are configured 4 nodes now 2nd and 3rd node is stopped. i’m not able to restart the mysql service. while start the mysql service facing the following error me… [Previous page](https://forums.percona.com/c/general-questions/6.md?page=3)