# Zendesk Migration Incomplete **URL:** https://community.zammad.org/t/zendesk-migration-incomplete/14908 **Category:** Technical assistance **Created:** [July 10, 2024, 5:06pm UTC](https://community.zammad.org/t/zendesk-migration-incomplete/14908 "2024-07-10T17:06:15Z") **Posts on this page:** 1 **Showing post:** 4
### Author: ![skip](https://community.zammad.org/user_avatar/community.zammad.org/skip/32/8559_2.png) [@skip](https://community.zammad.org/u/skip) #### Post date: [July 12, 2024, 7:30am UTC](https://community.zammad.org/t/zendesk-migration-incomplete/14908/4 "2024-07-12T07:30:10Z")
For the Database and parameters I suggest to read the docs and search the forum posts to learn more about it. Do not blindly apply numbers. Straight from the documentation: > **[Performance Tuning - Hardware — Zammad System Documentation documentation](https://docs.zammad.org/en/latest/prerequisites/hardware.html#performance-tuning)** > > Tip > **[Environment Variables — Zammad System Documentation documentation](https://docs.zammad.org/en/latest/appendix/environment-variables.html)** Some interesting threads: > [@Scheduler fails with "ActiveRecord::ConnectionTimeoutError: could not obtain a connection from the pool within 5.000 seconds (waited 5.000 seconds); all pooled connections were in use\>"](https://community.zammad.org/t/scheduler-fails-with-activerecord-could-not-obtain-a-connection-from-the-pool-within-5-000-seconds-waited-5-000-seconds-all-pooled-connections-were-in-use/14320/13): > > That fixes it for me, as well. > [@Zammad web UI slow / detailed documentation missing: How to troubleshoot?](https://community.zammad.org/t/zammad-web-ui-slow-detailed-documentation-missing-how-to-troubleshoot/10713): > > Infos: Used Zammad version: 5.3.0-1671105844.50103cfd.centos7 Used Zammad installation type: RPM from repository Operating system: Linux (CentOS 7) Browser + version: Firefox, Chrome (various versions on various OSes) Problem Description: Since a few Zammad updates, Zammad web UI actions are slow. It can take up to 5 to 15 (or more) seconds for simple ticket updates like owner or state changes or email replies to become active and updated in the browser. It’s not a browser or connectivity i… > [@Zammad 6.3 performance issues](https://community.zammad.org/t/zammad-6-3-performance-issues/14537): > > Infos: Zammad Version: 6.3.1 Installation Type: Package Operating System: Ubuntu 22.04.4 LTS Browser + Version: Any browser (currently using Chrome, Version 125.0.6422.113) Expected Behavior: Fast ticket display in overviews, quick API responses, efficient database connections, and overall fast performance. Actual Behavior: A high volume of tickets being created and updated simultaneously causes a backlog of jobs. Zammad starts using 100% CPU and displays the message ‘Connection lost’ to … > [@Scheduler fails with "ActiveRecord::ConnectionTimeoutError: could not obtain a connection from the pool within 5.000 seconds (waited 5.000 seconds); all pooled connections were in use\>"](https://community.zammad.org/t/scheduler-fails-with-activerecord-could-not-obtain-a-connection-from-the-pool-within-5-000-seconds-waited-5-000-seconds-all-pooled-connections-were-in-use/14320): > > Infos: Used Zammad version: 6.3.0 Used Zammad installation type: docker-compose Operating system: Ubuntu 22.04.4 LTS (jammy) Browser + version: Chrome 124.0.6367.201 Expected behavior: Scheduler able to finish tasks Actual behavior: Some scheduled tasks never finish (mostly Channel.stream, Sessions.jobs, but also others), showing errors in the zammad-scheduler container. Yet some tasks seem to complete just fine. (The LDAP sync and Office 365 integrations do seem to update). Monitor tab sho… Sorry for not giving straight answers, but it highly depends on your setup. e.g. Elasticsearch will also eat up resources while indexing, etc… --- _[View the full topic](https://community.zammad.org/t/zendesk-migration-incomplete/14908)._