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| author | Eric Wong <e@80x24.org> | 2019-01-31 08:52:49 +0000 |
|---|---|---|
| committer | Eric Wong <e@80x24.org> | 2019-01-31 08:55:44 +0000 |
| commit | 0608470d1f1ecd2cbf92c52313992a1c6dbebab2 (patch) | |
| tree | 7f8cd6cfcf50720d426d7da378caa05626326f68 /Documentation/public-inbox-config.pod | |
| parent | 5b9808f2a93a94c86b8b05a54270007973f88313 (diff) | |
| download | public-inbox-0608470d1f1ecd2cbf92c52313992a1c6dbebab2.tar.gz | |
I've relied on this feature to keep the VPS behind https://public-inbox.org/git/ from OOM-ing since 2016, so document it to ensure others can make use of low-end servers like I do. More limiters may become configurable for viewvcs and solver functionality (or we continue using the default one).
Diffstat (limited to 'Documentation/public-inbox-config.pod')
| -rw-r--r-- | Documentation/public-inbox-config.pod | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/Documentation/public-inbox-config.pod b/Documentation/public-inbox-config.pod index 23ebcc5f..cad0c4ee 100644 --- a/Documentation/public-inbox-config.pod +++ b/Documentation/public-inbox-config.pod @@ -91,6 +91,18 @@ C<nntp://news.gmane.org/gmane.mail.public-inbox.general> Default: none +=item publicinbox.<name>.httpbackendmax + +If a digit, the maximum number of parallel +L<git-http-backend(1)> processes to allow for cloning this +particular inbox. + +If an alphanumeric value starting with a lowercase alphabetic +character is specified, the inbox will use a L</NAMED LIMITER> +which can be shared by multiple inboxes. + +Default: 32 (using a default limiter shared by all inboxes) + =item publicinbox.<name>.coderepo The nickname of a "coderepo" section associated with the inbox. @@ -169,6 +181,53 @@ Default: none =back +=head2 NAMED LIMITER (PSGI) + +Named limiters are useful for preventing large inboxes from +monopolizing (or overloading) the server. Since serving git +clones (via L<git-http-backend(1)> can be memory-intensive for +large inboxes, it makes sense to put large inboxes on a named +limiter with a low max value; while smaller inboxes can use +the default limiter. + +=over 8 + +=item publicinboxlimiter.<name>.max + +The maximum number of parallel processes for the given limiter. + +=back + +=head3 EXAMPLE WITH NAMED LIMITERS + + ; big inboxes which require lots of memory to clone: + [publicinbox "big1"] + mainrepo = /path/to/big1 + address = big1@example.com + httpbackendmax = big + [publicinbox "big2"] + mainrepo = /path/to/big2 + address = big2@example.com + httpbackendmax = big + + ; tiny inboxes which are easily cloned: + [publicinbox "tiny1"] + mainrepo = /path/to/tiny1 + address = tiny1@example.com + [publicinbox "tiny2"] + mainrepo = /path/to/tiny2 + address = tiny2@example.com + + [publicinboxlimiter "big"] + max = 4 + +In the above example, the "big1" and "big2" are limited to four +parallel L<git-http-backend(1)> processes between them. + +However, "tiny1" and "tiny2" will share the default limiter +which means there can be 32 L<git-http-backend(1)> processes +between them. + =head1 ENVIRONMENT =over 8 |