Fixes: https://github.com/element-hq/element-meta/issues/2155
Fixes: https://github.com/element-hq/synapse/issues/2046

Added a note in the documentation suggesting that users may set
`PYTHONMALLOC=malloc` when using `jemalloc`. This allows jemalloc to
track memory usage more accurately by bypassing Python's internal
small-object allocator (`pymalloc`), helping to ensure that
`cache_autotuning` functions as expected.

This doc change aims to provide more clarity for users configuring
jemalloc with Synapse.


Based on:
https://github.com/element-hq/synapse/blob/4ac783549c5bac7a490a715d359f330bb0b1a161/synapse/metrics/jemalloc.py#L198-L201

### Pull Request Checklist

<!-- Please read
https://element-hq.github.io/synapse/latest/development/contributing_guide.html
before submitting your pull request -->

* [X] Pull request is based on the develop branch
* [X] Pull request includes a [changelog
file](https://element-hq.github.io/synapse/latest/development/contributing_guide.html#changelog).
The entry should:
- Be a short description of your change which makes sense to users.
"Fixed a bug that prevented receiving messages from other servers."
instead of "Moved X method from `EventStore` to `EventWorkerStore`.".
  - Use markdown where necessary, mostly for `code blocks`.
  - End with either a period (.) or an exclamation mark (!).
  - Start with a capital letter.
- Feel free to credit yourself, by adding a sentence "Contributed by
@github_username." or "Contributed by [Your Name]." to the end of the
entry.
* [X] [Code
style](https://element-hq.github.io/synapse/latest/code_style.html) is
correct
(run the
[linters](https://element-hq.github.io/synapse/latest/development/contributing_guide.html#run-the-linters))

Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>

Signed-off-by: Christian Lölkes <christian.loelkes@gmail.com>

Spawning from https://github.com/matrix-org/synapse/pull/15731

R30v2 has been out since 2021-07-19 (https://github.com/matrix-org/synapse/pull/10332)
and we started collecting stats on 2021-08-16. Since it's been over a year now
(almost 2 years), this is enough grace period for us to now rip it out.

* Update database_maintenance_tools.md

Included a blog post by Jackson Chen, which DID work when I followed it to perform Matrix Synapse Maintenance, versus the 2020 blog post by Victor Berger, which DID NOT work when performining maintenance.

* Update database_maintenance_tools.md

* Rephrasing

* Add account data to to export command

* newsfile

* remove not needed function

* update newsfile

* adopt #14973

* The user's profile information.
* The user's devices.
* The user's connections / IP address information.

* Add `tag` to `listeners` documentation

* newsfile

* Fix stale external links

* Fix some internal links

* Fix URLs without trailing / where needed

* Fix more links

* Newsfile

Signed-off-by: Olivier Wilkinson (reivilibre) <oliverw@matrix.org>

* Reapply docs/openid.md fix after conflict

Signed-off-by: Olivier Wilkinson (reivilibre) <oliverw@matrix.org>

Signed-off-by: Brennan Chapman <brennan@chapmanb.com>

* Rename legacy metrics in MAU docs

* changelog

Update request log format documentation to mention the format used when the authenticated user is controlling another user. (#13794)

* Add monthly active users documentation

* changelog

* Tidy up notes

* more tidyup

* Rewrite #1

* link back to mau docs

* fix links

* s/appservice|AS/application service

* further review

* a newline

* Remove bit about shadow banned users.

I think talking about them is confusing, and the current text doesn't imply they get any special treatment.

* Update docs/usage/administration/monthly_active_users.md

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>

* Update docs/usage/administration/monthly_active_users.md

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>

Co-authored-by: Brendan Abolivier <babolivier@matrix.org>
Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>

* Improved section regarding server admin

Added steps describing how to elevate an existing user to administrator by manipulating a `postgres` database.

Signed-off-by: jejo86 <28619134+jejo86@users.noreply.github.com>

* Improved section regarding server admin

* Reference database settings

Add instructions to check database settings to find out the database name, instead of listing all available PostgreSQL databases.

* Add suggestions from PR conversation

Replace config filename `homeserver.yaml`. with "config file".
Remove instructions to switch to `postgres` user.
Add instructions how to connect to SQLite database.

* Update changelog.d/13230.doc

Co-authored-by: reivilibre <olivier@librepush.net>

* Admin API request explanation improved

Pointed out, that the Admin API is not accessible by default from any remote computer, but only from the PC `matrix-synapse` is running on.
Added a full, working example, making sure to include the cURL flag `-X`, which needs to be prepended to `GET`, `POST`, `PUT` etc. and listing the full query string including protocol, IP address and port.

* Admin API request explanation improved

* Apply suggestions from code review

Update changelog. Reword prose.

Co-authored-by: David Robertson <david.m.robertson1@gmail.com>

Don't log stack traces for cancelled requests and use a custom HTTP
status code of 499.

Signed-off-by: Sean Quah <seanq@element.io>

* Two scripts are basically entry_points already
* Move and rename scripts/* to synapse/_scripts/*.py
* Delete sync_room_to_group.pl
* Expose entry points in setup.py
* Update linter script and config
* Fixup scripts & docs mentioning scripts that moved

Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>

* Fix get federation status of destination if no error occured

This reverts commit 158d73eb.

Revert "Sort internal changes in changelog"
Revert "Update CHANGES.md"
Revert "1.49.0rc1"
Revert "Revert "Move `glob_to_regex` and `re_word_boundary` to `matrix-python-common` (#11505) (#11527)"
Revert "Refactors in `_generate_sync_entry_for_rooms` (#11515)"
Revert "Correctly register shutdown handler for presence workers (#11518)"
Revert "Fix `ModuleApi.looping_background_call` for non-async functions (#11524)"
Revert "Fix 'delete room' admin api to work on incomplete rooms (#11523)"
Revert "Correctly ignore invites from ignored users (#11511)"
Revert "Fix the test breakage introduced by #11435 as a result of concurrent PRs (#11522)"
Revert "Stabilise support for MSC2918 refresh tokens as they have now been merged into the Matrix specification. (#11435)"
Revert "Save the OIDC session ID (sid) with the device on login (#11482)"
Revert "Add admin API to get some information about federation status (#11407)"
Revert "Include bundled aggregations in /sync and related fixes (#11478)"
Revert "Move `glob_to_regex` and `re_word_boundary` to `matrix-python-common` (#11505)"
Revert "Update backward extremity docs to make it clear that it does not indicate whether we have fetched an events' `prev_events` (#11469)"
Revert "Support configuring the lifetime of non-refreshable access tokens separately to refreshable access tokens. (#11445)"
Revert "Add type hints to `synapse/tests/rest/admin` (#11501)"
Revert "Revert accidental commits to develop."
Revert "Newsfile"
Revert "Give `tests.server.setup_test_homeserver` (nominally!) the same behaviour"
Revert "Move `tests.utils.setup_test_homeserver` to `tests.server`"
Revert "Convert one of the `setup_test_homeserver`s to `make_test_homeserver_synchronous`"
Revert "Disambiguate queries on `state_key` (#11497)"
Revert "Comments on the /sync tentacles (#11494)"
Revert "Clean up tests.storage.test_appservice (#11492)"
Revert "Clean up `tests.storage.test_main` to remove use of legacy code. (#11493)"
Revert "Clean up `tests.test_visibility` to remove legacy code. (#11495)"
Revert "Minor cleanup on recently ported doc pages  (#11466)"
Revert "Add most of the missing type hints to `synapse.federation`. (#11483)"
Revert "Avoid waiting for zombie processes in `synctl stop` (#11490)"
Revert "Fix media repository failing when media store path contains symlinks (#11446)"
Revert "Add type annotations to `tests.storage.test_appservice`. (#11488)"
Revert "`scripts-dev/sign_json`: support for signing events (#11486)"
Revert "Add MSC3030 experimental client and federation API endpoints to get the closest event to a given timestamp (#9445)"
Revert "Port wiki pages to documentation website (#11402)"
Revert "Add a license header and comment. (#11479)"
Revert "Clean-up get_version_string (#11468)"
Revert "Link background update controller docs to summary (#11475)"
Revert "Additional type hints for config module. (#11465)"
Revert "Register the login redirect endpoint for v3. (#11451)"
Revert "Update openid.md"
Revert "Remove mention of OIDC certification from Dex (#11470)"
Revert "Add a note about huge pages to our Postgres doc (#11467)"
Revert "Don't start Synapse master process if `worker_app` is set (#11416)"
Revert "Expose worker & homeserver as entrypoints in `setup.py` (#11449)"
Revert "Bundle relations of relations into the `/relations` result. (#11284)"
Revert "Fix `LruCache` corruption bug with a `size_callback` that can return 0 (#11454)"
Revert "Eliminate a few `Any`s in `LruCache` type hints (#11453)"
Revert "Remove unnecessary `json.dumps` from `tests.rest.admin` (#11461)"
Revert "Merge branch 'master' into develop"

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