proxysql | High-performance MySQL proxy with a GPL license | Proxy library
kandi X-RAY | proxysql Summary
kandi X-RAY | proxysql Summary
ProxySQL is a high performance, high availability, protocol aware proxy for MySQL and forks (like Percona Server and MariaDB). All the while getting the unlimited freedom that comes with a GPL license. Its development is driven by the lack of open source proxies that provide high performance.
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QUESTION
please help
i currently working to setup ProxySQL with 1 master and 2 slave. I have setup mysql_query_rules like this here the image but i tested on mysql client working as expected, insert goes to master and select goes to slave. but when i connect my PHP project to ProxySQL i got error when insert anything.
My OS : Centos 7 PHP : 7.4.23 (Silverstripe 3) maybe there someone who have experience trouble like this, and have solved.
...ANSWER
Answered 2021-Aug-30 at 15:43Finaly solved, this error happen because bug on silverstripe when insert actually insert first to get ID and then update it to fill the field. but when try to update it check the ID first this make the problem because when insert proxysql goes to master, but when select for check ID goes to slave that not yet update by the insert from master because delay. so i use match_digest to query for check the ID and arranged to master hostgroup.
QUESTION
I've notice some syntax error in my proxysql error log (/var/lib/proxysql/proxysql.log
):
ANSWER
Answered 2021-Apr-29 at 10:17Execute Set mysql-verbose_query_error = true
when you begin the database connection in your applications.
FYI:
Functionality regarding the variable: mysql-verbose_query_error
QUESTION
TLDR; Proxysql isn't sending any data to or replicas. The master works just fine, and the replicas are all caught up, but they aren't serving traffic.
Overview: The main issue is that no traffic is going to the replicas:
- We have 4 mysql clusters. Each one has a master, and two replicas.
- The replicas are all caught up to master and replicating fine.
- We are on... Drupal (sigh) for now, so we have multiple databases per cluster. All with their own proxysql user and default host group.
- Proxysql shows null on connection errors to the replicas. It looks like it can connect.
- But all the traffic just hits the master. It serves all select, update, and delete statement.
- We have our masters and replicas set up in their own write and read groups (not in the same host group as we'd prefer to manually dictate which is a master and which are replicas).
Question: How do we get data hitting our replicas and not just the master?
Configs:
...ANSWER
Answered 2021-Feb-05 at 22:19The answer is that mysql_query_rules_fast_routing rules don't get applied if the last mysql_query_rules rule has an apply of 1. You need to leave that as apply=0 and then the fast query rules will then get applied.
QUESTION
We are trying to track down a memory leak in proxysql (2.0.14) which uses jemalloc (5.2.0). We compiled proxysql with debug symbols enabled. The jemalloc configuration that is baked into proxysql is the following:
...ANSWER
Answered 2020-Nov-02 at 20:00I think this may reflect some of the ambiguity in what "leak" means. Tools like Valgrind will traverse the pointer graph of the program at shutdown, and treat things as leaks if that traversal does not find some live allocation.
Other tools treat "leaks" as simply anything allocated but not freed. The profiling mode in jemalloc works more like this way. It reports an estimation of the live bytes attributable to various call stacks at program termination.
QUESTION
I have a database with a username, and password. The username is zerk2. I created this user and granted it all permissions known to man. I can use the php my admin panel to physically login to the server and it works every time. However, when I try to use php to log in, or node.js it tells me it cannot connect and gives me the following errors:
...ANSWER
Answered 2020-Jun-17 at 21:02Looks like the issue is the host 'zerk2'@'2a02:4780:bad:f00d::7'
. You maybe on the same machine but your php and node running from different servers and looks like your node is running via a proxy. php could be running from apache and nodejs from another http server. Not sure how you have set up the server. To fix this you have to modify or create a mysql user with host set to %
to allow access from any host.
UPDATES:
It's failing to connect to mysql server Error: connect ECONNREFUSED 127.0.0.1:3306
for NodeJS. Try to use server's ip address or domain as host instead of localhost
and see if that works for you. PHP looks like it connects but the user don't have access could be the password or the user can't access it from host 2a02:4780:bad:f00d::7
that's why you'll need a mysql user with host %
. Also note it will not work if you have two users with that same name and one's host is not %
.
QUESTION
I want to run a task in ansible something similar to the following.
...ANSWER
Answered 2020-Jun-08 at 23:58There are two problems:
In the playbook, tasks are included in a loop that has the loop variable name
item
and the included task also has a loop and the default variable name is againitem
. This is why the warning messages and to solve that useloop_control
.my_var: item
assignment needs to be in formatmy_var: "{{ item }}"
for correct assignment.
After both the corrections, playbook would look like this.
QUESTION
I've installed Percona XtraDB on kubernetes using 1.3.0 operator.
After using it, I wanted to delete the namespace. So I deleted them in the order which I applied them. Everything is deleted and nothing is visible in svc, pods but there are two resources which are in errored state and cannot be deleted.
...ANSWER
Answered 2020-Apr-22 at 09:11Your perconaxtradbclusters
yaml example mentions pvc resources, so you'll probably have to delete the associated pvc first, if you haven't already done so.
Can you edit the resources to remove the finalizer blocks, and try delete them again?
kubectl edit perconaxtradbclusters cluster1 -n pxc
and delete
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