adjusting_pull_frequency.txt
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Authored by epriestley on Apr 7 2014, 1:35 PM.

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	F140244: adjusting_pull_frequency.txt
	Apr 7 2014, 1:35 PM

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	There's a mechanism for adjusting pull frequency, but there's no UI for it and it may not be around for too long after T4605 (most users want to increase the pull frequency). However, it should work for now, and if it stops working later you can yell at us again and we can figure something out. T4605 will introduce smart backoff, and maybe some more controls, so it might sort this out anyway.

	In `phabricator_repository.repository`, there's a "details" column which stores a JSON blob. Here's an example:


	mysql> select * FROM repository WHERE callsign = 'HGTEST'\G
	************************* 1. row *************************
	id: 3
	phid: PHID-REPO-yrujbpx2e5hwifivvsql
	name: Mercurial Test
	callsign: HGTEST
	versionControlSystem: hg
	details: {"tracking-enabled":true,"remote-uri":"file:\/\/\/INSECURE\/repos\/hg-private-remote","local-path":"\/INSECURE\/repos\/daemon-HGTEST22","disable-autoclose":false,"pull-frequency":15,"default-branch":"a:b","default-owners-path":"\/","ssh-login":"","ssh-key":"","ssh-keyfile":"","http-login":null,"http-pass":null,"herald-disabled":0,"detail-parser":"PhabricatorRepositoryDefaultCommitMessageDetailParser","serve-over-http":"readwrite","serve-over-ssh":"readwrite","hosting-enabled":true,"importing":false}
	dateCreated: 1340674301
	dateModified: 1384128195
	uuid: NULL
	viewPolicy: public
	editPolicy: admin
	pushPolicy: users
	credentialPHID: NULL
	1 row in set (0.00 sec)


	You can add (or adjust) the "pull-frequency" key, which is measured in seconds. There's no UI for this so you'll have to do it in the database:

	- Copy/paste the JSON blob out.
	- Add or adjust the value.
	- Very carefully, update the row.

	Alternatively, you can use some approximation of this script (put it in phabricator/, run with php -f script.php):


	<?php

	require_once 'scripts/__init_script__.php';

	// Replace "EXAMPLE" with the correct callsign.
	$repository = id(new PhabricatorRepository())->loadOneWhere('callsign = %s', "EXAMPLE");

	// Adjust this, in seconds.
	$repository->setDetail('pull-frequency', 60);
	$repository->save();


	After making either of these changes, restart the daemons.

	The pull frequency is advisory, but bumping it up a bunch should result in less daemon activity, at least until T4605.

	(Obviously, the cost of this is slower discovery of new commits.)

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epriestley edited the content of this paste. (Show Details)Apr 7 2014, 1:35 PM

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