Google Git
Sign in
gerrit / gerrit / 141a4b6c9859eec203a0ecd3cadb732acd1cd583
commit141a4b6c9859eec203a0ecd3cadb732acd1cd583[log] [tgz]
authorMatthias Sohn <matthias.sohn@sap.com>Fri May 17 15:05:46 2019 +0200
committerDavid Pursehouse <dpursehouse@collab.net>Tue May 28 00:15:03 2019 +0000
tree1d61900764173893640e5d2c9b9012cdfa6ba134
parent99648a2154da5af37724bf000f1cd0a4b19dd3a9 [diff]
Parallelize account migration in schema 146 migration

* Run gc --prune=now before the migration, this improves performance
* Default number of migration threads: <number of processors>,
  manual configuration via system property threadcount
* For FileRepositorys pack refs every 1000 accounts, otherwise
  performance degrades continuously. Running full gc takes much longer.

This reduced runtime for migration 146 on an empty gerrit 2.14 site with
10000 accounts from 646 seconds to 98 seconds on a MacBook.

Without this change migration time has quadratic complexity and the
average migration rate degrades from 77 accounts/second for 1000 users
to 15 accounts/second for 10000 accounts.

With this change the migration rate is constant 102 accounts/second up
to 128k accounts.

See https://docs.google.com/spreadsheets/d/1U86RdHZ_Em5vr-NSK8coaYdlZ1VGLzmRcpOPt_1c04w

Change-Id: Iac69acfeb2adba0ff5b63a11843a7aa839b98917
1 file changed
tree: 1d61900764173893640e5d2c9b9012cdfa6ba134
  1. .settings/
  2. contrib/
  3. Documentation/
  4. gerrit-acceptance-framework/
  5. gerrit-acceptance-tests/
  6. gerrit-cache-h2/
  7. gerrit-cache-mem/
  8. gerrit-common/
  9. gerrit-elasticsearch/
  10. gerrit-extension-api/
  11. gerrit-gpg/
  12. gerrit-gwtdebug/
  13. gerrit-gwtexpui/
  14. gerrit-gwtui/
  15. gerrit-gwtui-common/
  16. gerrit-httpd/
  17. gerrit-index/
  18. gerrit-launcher/
  19. gerrit-lucene/
  20. gerrit-main/
  21. gerrit-oauth/
  22. gerrit-openid/
  23. gerrit-patch-commonsnet/
  24. gerrit-patch-jgit/
  25. gerrit-pgm/
  26. gerrit-plugin-api/
  27. gerrit-plugin-gwtui/
  28. gerrit-prettify/
  29. gerrit-reviewdb/
  30. gerrit-server/
  31. gerrit-sshd/
  32. gerrit-test-util/
  33. gerrit-util-cli/
  34. gerrit-util-http/
  35. gerrit-util-ssl/
  36. gerrit-war/
  37. lib/
  38. plugins/
  39. polygerrit-ui/
  40. ReleaseNotes/
  41. tools/
  42. website/
  43. .bazelproject
  44. .bazelrc
  45. .editorconfig
  46. .git-blame-ignore-revs
  47. .gitignore
  48. .gitmodules
  49. .mailmap
  50. .pydevproject
  51. 0001-Replace-native-http-git-_archive-with-Skylark-rules.patch
  52. BUILD
  53. COPYING
  54. INSTALL
  55. README.md
  56. SUBMITTING_PATCHES
  57. version.bzl
  58. WORKSPACE
README.md

Gerrit Code Review

Gerrit is a code review and project management tool for Git based projects.

Build Status

Objective

Gerrit makes reviews easier by showing changes in a side-by-side display, and allowing inline comments to be added by any reviewer.

Gerrit simplifies Git based project maintainership by permitting any authorized user to submit changes to the master Git repository, rather than requiring all approved changes to be merged in by hand by the project maintainer.

Documentation

For information about how to install and use Gerrit, refer to the documentation.

Source

Our canonical Git repository is located on googlesource.com. There is a mirror of the repository on Github.

Reporting bugs

Please report bugs on the issue tracker.

Contribute

Gerrit is the work of hundreds of contributors. We appreciate your help!

Please read the contribution guidelines.

Note that we do not accept Pull Requests via the Github mirror.

Getting in contact

The IRC channel on freenode is #gerrit. An archive is available at: echelog.com.

The Developer Mailing list is repo-discuss on Google Groups.

License

Gerrit is provided under the Apache License 2.0.

Build

Install Bazel and run the following:

    git clone --recursive https://gerrit.googlesource.com/gerrit
    cd gerrit && bazel build release

Install binary packages (Deb/Rpm)

The instruction how to configure GerritForge/BinTray repositories is here

On Debian/Ubuntu run:

    apt-get update & apt-get install gerrit=<version>-<release>

NOTE: release is a counter that starts with 1 and indicates the number of packages that have been released with the same version of the software.

On CentOS/RedHat run:

    yum clean all && yum install gerrit-<version>[-<release>]

On Fedora run:

    dnf clean all && dnf install gerrit-<version>[-<release>]

Use pre-built Gerrit images on Docker

Docker images of Gerrit are available on DockerHub

To run a CentOS 7 based Gerrit image:

    docker run -p 8080:8080 gerritforge/gerrit-centos7[:version]

To run a Ubuntu 15.04 based Gerrit image:

    docker run -p 8080:8080 gerritforge/gerrit-ubuntu15.04[:version]

NOTE: release is optional. Last released package of the version is installed if the release number is omitted.