| commit | 23db8a546b800b2c91629d80b6f5117ff635238a | [log] [tgz] |
|---|---|---|
| author | Luca Milanesio <luca.milanesio@gmail.com> | Wed Apr 06 02:49:11 2022 +0100 |
| committer | Luca Milanesio <luca.milanesio@gmail.com> | Fri Apr 08 01:32:54 2022 +0100 |
| tree | 704b0be091a86899cfe04efeb3ab1a844d68a663 | |
| parent | 37f56cc4c9220af4f6084ec9d4c6ed5be3921cf8 [diff] |
Cache change /meta ref SHA1 for each REST API request Some Gerrit REST APIs may cause multiple lookups of change /meta ref name to SHA1 during the same request, which could be as slow as 400 ms per lookup for a 500k refs repository on a shared NFS volume. Make sure that a lookup of a /meta ref happens only once per GET/HEAD API request by caching the result in a PerThreadCache scoped to the execution of the RestApiServlet. The measured improvement for a change reindex API (repo with 500k refs stored on an external NFS volume with trustfolderstat=false) is from 5s down to 500ms (10 times faster). For other APIs or local storage with trustfolderstat=true, the benefits are much more limited. NOTE: The improvement on all other APIs (PUT, POST, DELETE, PATCH) is outside the scope of this change, because it would imply a more complex eviction mechanism due to the mutation of the /meta ref during the potential NoteDb manipulation performed. Bug: Issue 15798 Release-Notes: cache the resolution of change /meta ref on REST API Change-Id: If41377b78cb0bbbde0fb22489a47f7634248e6f6
Gerrit is a code review and project management tool for Git based projects.
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.
For information about how to install and use Gerrit, refer to the documentation.
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Please report bugs on the issue tracker.
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.
The Developer Mailing list is repo-discuss on Google Groups.
Gerrit is provided under the Apache License 2.0.
Install Bazel and run the following:
git clone --recurse-submodules https://gerrit.googlesource.com/gerrit
cd gerrit && bazel build release
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>]
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.