Bug #69341 semi-sync replication is very slow with many clients
Submitted: 29 May 2013 0:55 Modified: 5 Jul 2013 10:13
Reporter: Yoshinori Matsunobu (OCA) Email Updates:
Status: Closed Impact on me:
Category:MySQL Server: Replication Severity:S5 (Performance)
Version:5.6.11 OS:Any
Assigned to: CPU Architecture:Any

File: Maximum allowed size is 3MB.

If the data you need to attach is more than 3MB, you should create a compressed archive of the data and a README file that describes the data with a filename that includes the bug number (recommended filename: mysql-bug-data-69341.zip) and upload one to sftp.oracle.com. A free Oracle Web (SSO) account (the one you use to login bugs.mysql.com) and a client that supports SFTP are required in order to access the SFTP server.

To upload the file to sftp.oracle.com:

  1. Open an SFTP client and connect to sftp.oracle.com. Specify port 2021 and remote directory /support/incoming/.
  2. Log in with your newly created Oracle Web account (email address) and password.
  3. Upload the archive to /support/incoming.
  4. Once you have uploaded the file, add a comment to this bug to notify us about it.
Example: sftp -oPort=2021 -oUser=email sftp.oracle.com:/support/incoming

Usage Notes: This directory is unlistable, which means that once you have uploaded your file, you will not be able to see it. A file cannot be uploaded more than once with the same filename. The filename must be changed before attempting to upload the file again. The filename should always start with mysql-bug- prefix. Files are retained on the SFTP server for 7 days and then permanently removed.

[4 Jun 2013 4:21] Libing Song
test performance with mysqlslap

Attachment: my_test.sh (application/x-shellscript, text), 5.40 KiB.

[4 Jun 2013 4:27] Libing Song
copy it into mysql-test/include

Attachment: install_semisync.inc (application/octet-stream, text), 1.08 KiB.

[7 Jun 2013 0:57] Libing Song
patch for the bug

Attachment: libing-bug69341.diff (text/x-patch), 1.71 KiB.