☰

redmine 写入性能较差（更新不是真正的多线程）

tag-icon • tag-icon redmine
redmine 写入性能较差（更新不是真正的多线程）

（已经自我回答) 我正在努力解决大约 100 个用户的 redmine 性能不佳的问题。为了测试它，我设置了一个简单的场景来更新五个不同示例问题的“完成百分比”。所有更新都从完全相同的秒开始，使用curl。令我惊讶的是，redmine 中的更新似乎是序列化的（我的意思是不是多线程的），时间如下：

real    0m1.122s
real    0m1.404s
real    0m2.258s
real    0m2.782s
real    0m3.151s
real    0m3.336s

或者，当其他会话的某些处理也受到干扰时，再尝试一次：

real    0m7.492s
real    0m7.803s
real    0m8.045s
real    0m8.246s
real    0m8.597s
real    0m8.825s

在处理大量 SQL 查询之后，关键时刻production.log是提交阶段。请注意，提交是在几毫秒内完成的，但在提交之间发生了一些神秘的事情，不仅将它们序列化，而且还需要秒进入完成状态。此日志摘录完整无损 - 我没有删除中间的任何行。

   (0.6ms)  SELECT COUNT(*) FROM `custom_workflows` WHERE `custom_workflows`.`active` = 1 AND `custom_workflows`.`observable` = 'issue' AND (is_for_all OR EXISTS (SELECT * FROM custom_workflows_projects WHERE project_id=123 AND custom_workflow_id=id))
   (30.1ms)  COMMIT
Redirected to http://redmine.mydomain.local/issues/11973
Completed 302 Found in 7418.4ms (ActiveRecord: 135.8ms)
   (0.6ms)  SELECT COUNT(*) FROM `custom_workflows` WHERE `custom_workflows`.`active` = 1 AND `custom_workflows`.`observable` = 'issue' AND (is_for_all OR EXISTS (SELECT * FROM custom_workflows_projects WHERE project_id=123 AND custom_workflow_id=id))
   (24.8ms)  COMMIT
Redirected to http://redmine.mydomain.local/issues/9240
Completed 302 Found in 7738.3ms (ActiveRecord: 57.4ms)
   (0.4ms)  SELECT COUNT(*) FROM `custom_workflows` WHERE `custom_workflows`.`active` = 1 AND `custom_workflows`.`observable` = 'issue' AND (is_for_all OR EXISTS (SELECT * FROM custom_workflows_projects WHERE project_id=123 AND custom_workflow_id=id))
   (25.9ms)  COMMIT
Redirected to http://redmine.mydomain.local/issues/9614
Completed 302 Found in 7949.0ms (ActiveRecord: 135.7ms)
   (0.5ms)  SELECT COUNT(*) FROM `custom_workflows` WHERE `custom_workflows`.`active` = 1 AND `custom_workflows`.`observable` = 'issue' AND (is_for_all OR EXISTS (SELECT * FROM custom_workflows_projects WHERE project_id=123 AND custom_workflow_id=id))
   (24.6ms)  COMMIT
Redirected to http://redmine.mydomain.local/issues/12016
Completed 302 Found in 8058.5ms (ActiveRecord: 102.5ms)
   (0.5ms)  SELECT COUNT(*) FROM `custom_workflows` WHERE `custom_workflows`.`active` = 1 AND `custom_workflows`.`observable` = 'issue' AND (is_for_all OR EXISTS (SELECT * FROM custom_workflows_projects WHERE project_id=123 AND custom_workflow_id=id))
   (21.2ms)  COMMIT
Redirected to http://redmine.mydomain.local/issues/8853
Completed 302 Found in 8472.5ms (ActiveRecord: 90.4ms)
   (0.5ms)  SELECT COUNT(*) FROM `custom_workflows` WHERE `custom_workflows`.`active` = 1 AND `custom_workflows`.`observable` = 'issue' AND (is_for_all OR EXISTS (SELECT * FROM custom_workflows_projects WHERE project_id=123 AND custom_workflow_id=id))
   (27.9ms)  COMMIT
Redirected to http://redmine.mydomain.local/issues/10007
Completed 302 Found in 8700.4ms (ActiveRecord: 137.4ms)

我已经检查过的内容：

  • 乘客状态的线程数过多
  • apache2 httpd 进程过多
  • mysql 5.1 使用 innodb
  • innotop 不显示锁
  • innotop 不会出现过多 I/O
  • iostat 没有显示过多的 I/O（大约 10-15 IOPS，磁盘最大时间使用率为 17%）
  • top 没有显示过多的 CPU 使用率（最大 70%，可能为 400%）。

答案1

好的，这是 SMTP 序列化事物；默认情况下它以某种方式未记录。

我已经改变了/var/www/html/redmine/config/configuration.yml：

  email_delivery:
    # delivery_method: :smtp       # slows down everything!
    delivery_method: :async_smtp

相关内容