upstream/mercurial-mirror Files · mercurial/help/urls.txt

util: lower water mark when removing nodes after cost limit reached...

util: lower water mark when removing nodes after cost limit reached See the inline comment for the reasoning here. This is a pretty common strategy for garbage collectors, other cache-like primtives. The performance impact is substantial: $ hg perflrucachedict --size 4 --gets 1000000 --sets 1000000 --mixed 1000000 --costlimit 100 ! inserts w/ cost limit ! wall 1.659181 comb 1.650000 user 1.650000 sys 0.000000 (best of 7) ! wall 1.722122 comb 1.720000 user 1.720000 sys 0.000000 (best of 6) ! mixed w/ cost limit ! wall 1.139955 comb 1.140000 user 1.140000 sys 0.000000 (best of 9) ! wall 1.182513 comb 1.180000 user 1.180000 sys 0.000000 (best of 9) $ hg perflrucachedict --size 1000 --gets 1000000 --sets 1000000 --mixed 1000000 --costlimit 10000 ! inserts ! wall 0.679546 comb 0.680000 user 0.680000 sys 0.000000 (best of 15) ! sets ! wall 0.825147 comb 0.830000 user 0.830000 sys 0.000000 (best of 13) ! inserts w/ cost limit ! wall 25.105273 comb 25.080000 user 25.080000 sys 0.000000 (best of 3) ! wall 1.724397 comb 1.720000 user 1.720000 sys 0.000000 (best of 6) ! mixed ! wall 0.807096 comb 0.810000 user 0.810000 sys 0.000000 (best of 13) ! mixed w/ cost limit ! wall 12.104470 comb 12.070000 user 12.070000 sys 0.000000 (best of 3) ! wall 1.190563 comb 1.190000 user 1.190000 sys 0.000000 (best of 9) $ hg perflrucachedict --size 1000 --gets 1000000 --sets 1000000 --mixed 1000000 --costlimit 10000 --mixedgetfreq 90 ! inserts ! wall 0.711177 comb 0.710000 user 0.710000 sys 0.000000 (best of 14) ! sets ! wall 0.846992 comb 0.850000 user 0.850000 sys 0.000000 (best of 12) ! inserts w/ cost limit ! wall 25.963028 comb 25.960000 user 25.960000 sys 0.000000 (best of 3) ! wall 2.184311 comb 2.180000 user 2.180000 sys 0.000000 (best of 5) ! mixed ! wall 0.728256 comb 0.730000 user 0.730000 sys 0.000000 (best of 14) ! mixed w/ cost limit ! wall 3.174256 comb 3.170000 user 3.170000 sys 0.000000 (best of 4) ! wall 0.773186 comb 0.770000 user 0.770000 sys 0.000000 (best of 13) $ hg perflrucachedict --size 100000 --gets 1000000 --sets 1000000 --mixed 1000000 --mixedgetfreq 90 --costlimit 5000000 ! gets ! wall 1.191368 comb 1.190000 user 1.190000 sys 0.000000 (best of 9) ! wall 1.195304 comb 1.190000 user 1.190000 sys 0.000000 (best of 9) ! inserts ! wall 0.950995 comb 0.950000 user 0.950000 sys 0.000000 (best of 11) ! inserts w/ cost limit ! wall 1.589732 comb 1.590000 user 1.590000 sys 0.000000 (best of 7) ! sets ! wall 1.094941 comb 1.100000 user 1.090000 sys 0.010000 (best of 9) ! mixed ! wall 0.936420 comb 0.940000 user 0.930000 sys 0.010000 (best of 10) ! mixed w/ cost limit ! wall 0.882780 comb 0.870000 user 0.870000 sys 0.000000 (best of 11) This puts us ~2x slower than caches without cost accounting. And for read-heavy workloads (the prime use cases for caches), performance is nearly identical. In the worst case (pure write workloads with cost accounting enabled), we're looking at ~1.5us per insert on large caches. That seems "fast enough." Differential Revision: https://phab.mercurial-scm.org/D4505

Josef 'Jeff' Sipek - - Load All Authors

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Dan Villiom Podlaski Christiansen setup: install translation files as package data...	r9999	Valid URLs are of the form::

		local/filesystem/path[#revision]
Mads Kiilerich help: Backed out changeset e99facd2cd2a, description of file urls...	r15533	file://local/filesystem/path[#revision]
Dan Villiom Podlaski Christiansen setup: install translation files as package data...	r9999	http://[user[:pass]@]host[:port]/[path][#revision]
		https://[user[:pass]@]host[:port]/[path][#revision]
Matt Mackall help: ssh urls don't allow passwords	r13304	ssh://[user@]host[:port]/[path][#revision]
Dan Villiom Podlaski Christiansen setup: install translation files as package data...	r9999
		Paths in the local filesystem can either point to Mercurial
Mike Williams help: stop documentation markup appearing in generated help...	r19197	repositories or to bundle files (as created by :hg:`bundle` or
		:hg:`incoming --bundle`). See also :hg:`help paths`.
Dan Villiom Podlaski Christiansen setup: install translation files as package data...	r9999
		An optional identifier after # indicates a particular branch, tag, or
Martin Geisler Use hg role in help strings	r10973	changeset to use from the remote repository. See also :hg:`help
		revisions`.
Dan Villiom Podlaski Christiansen setup: install translation files as package data...	r9999
		Some features, such as pushing to http:// and https:// URLs are only
		possible if the feature is explicitly enabled on the remote Mercurial
		server.

Mads Kiilerich doc: clarify that https cert verification requires web.cacerts	r12593	Note that the security of HTTPS URLs depends on proper configuration of
		web.cacerts.

Dan Villiom Podlaski Christiansen setup: install translation files as package data...	r9999	Some notes about using SSH with Mercurial:

		- SSH requires an accessible shell account on the destination machine
Josef 'Jeff' Sipek help: fix wording describing SSH requirements	r36372	and a copy of hg in the remote path or specified with remotecmd.
Dan Villiom Podlaski Christiansen setup: install translation files as package data...	r9999	- path is relative to the remote user's home directory by default. Use
		an extra slash at the start of a path to specify an absolute path::

		ssh://example.com//tmp/repository

		- Mercurial doesn't use its own compression via SSH; the right thing
		to do is to configure it in your ~/.ssh/config, e.g.::

		Host *.mylocalnetwork.example.com
		Compression no
		Host *
		Compression yes

Brodie Rao help: refer to user configuration file more consistently...	r12083	Alternatively specify "ssh -C" as your ssh command in your
		configuration file or with the --ssh command line option.
Dan Villiom Podlaski Christiansen setup: install translation files as package data...	r9999
Brodie Rao help: refer to user configuration file more consistently...	r12083	These URLs can all be stored in your configuration file with path
		aliases under the [paths] section like so::
Dan Villiom Podlaski Christiansen setup: install translation files as package data...	r9999
		[paths]
		alias1 = URL1
		alias2 = URL2
		...

		You can then use the alias for any command that uses a URL (for
Martin Geisler Use hg role in help strings	r10973	example :hg:`pull alias1` will be treated as :hg:`pull URL1`).
Dan Villiom Podlaski Christiansen setup: install translation files as package data...	r9999
		Two path aliases are special because they are used as defaults when
		you do not provide the URL to a command:

		default:
		When you create a repository with hg clone, the clone command saves
		the location of the source repository as the new repository's
		'default' path. This is then used when you omit path from push- and
		pull-like commands (including incoming and outgoing).

		default-push:
		The push command will look for a path named 'default-push', and
		prefer it over 'default' if both are defined.

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