Bug #70641 5.6 partitions use much more memory than 5.1
Submitted: 16 Oct 2013 23:56 Modified: 29 Jul 2014 16:04
Reporter: Yoshinori Matsunobu (OCA) Email Updates:
Status: Closed Impact on me:
None 
Category:MySQL Server: Partitions Severity:S3 (Non-critical)
Version:5.6.14 OS:Any
Assigned to: CPU Architecture:Any

File: Maximum allowed size is 3MB.
Description:
Privacy:

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-70641.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.

[27 Mar 2014 11:32] Mattias Jonsson
Profile from google perftools; heap profile for one db with 100 tables with 100 partitions each in mysql-5.1

Attachment: heapprofile.db2.100t100p.51.4.pdf (application/pdf, text), 12.70 KiB.

[27 Mar 2014 11:33] Mattias Jonsson
Profile from google perftools; heap profile for one db with 100 tables with 100 partitions each in mysql-5.5

Attachment: heapprofile.db2.100t100p.55.2.pdf (application/pdf, text), 11.16 KiB.

[27 Mar 2014 11:35] Mattias Jonsson
Profile from google perftools; heap profile for one db with 100 tables with 100 partitions each in mysql-5.6

Attachment: heapprofile.db2.100t100p.56.2.pdf (application/pdf, text), 11.62 KiB.

[27 Mar 2014 11:37] Mattias Jonsson
mysql-5.6 with ha_innobase::srch_key_val allocated in index_init() and freed in index_end()

Attachment: heapprofile.db2.100t100p.56.4.pdf (application/pdf, text), 13.29 KiB.

[30 Jul 2014 12:34] Mattias Jonsson
Patch for mysql-5.6.19

Attachment: bug70641-5.6.19.diff (application/octet-stream, text), 12.12 KiB.