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experimentally rework update daemon to process all feeds with the same url sequentially to minimize network access and better utilize caches

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This commit is contained in:
Andrew Dolgov 2013-03-29 12:21:40 +04:00
parent 4f9cbdff1d
commit 1c4421fcd7
1 changed files with 31 additions and 12 deletions
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43
include/rssfuncs.php
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@ -108,9 +108,7 @@
$random_qpart = sql_random_function();
// We search for feed needing update.
$result = db_query($link, "SELECT ttrss_feeds.feed_url,ttrss_feeds.id, ttrss_feeds.owner_uid,
".SUBSTRING_FOR_DATE."(ttrss_feeds.last_updated,1,19) AS last_updated,
ttrss_feeds.update_interval
$result = db_query($link, "SELECT DISTINCT ttrss_feeds.feed_url
FROM
ttrss_feeds, ttrss_users, ttrss_user_prefs
WHERE
@ -118,8 +116,8 @@
AND ttrss_users.id = ttrss_user_prefs.owner_uid
AND ttrss_user_prefs.pref_name = 'DEFAULT_UPDATE_INTERVAL'
$login_thresh_qpart $update_limit_qpart
$updstart_thresh_qpart
ORDER BY feed_url,$random_qpart $query_limit");
$updstart_thresh_qpart
ORDER BY feed_url $query_limit");
$user_prefs_cache = array();
@ -128,27 +126,48 @@
// Here is a little cache magic in order to minimize risk of double feed updates.
$feeds_to_update = array();
while ($line = db_fetch_assoc($result)) {
$feeds_to_update[$line['id']] = $line;
array_push($feeds_to_update, db_escape_string($link, $line['feed_url']));
}
// We update the feed last update started date before anything else.
// There is no lag due to feed contents downloads
// It prevent an other process to update the same feed.
$feed_ids = array_keys($feeds_to_update);
if($feed_ids) {
if(count($feeds_to_update) > 0) {
$feeds_quoted = array();
foreach ($feeds_to_update as $feed) {
array_push($feeds_quoted, "'" . db_escape_string($link, $feed) . "'");
}
db_query($link, sprintf("UPDATE ttrss_feeds SET last_update_started = NOW()
WHERE id IN (%s)", implode(',', $feed_ids)));
WHERE feed_url IN (%s)", implode(',', $feeds_quoted)));
}
expire_cached_files($debug);
expire_lock_files($debug);
// For each feed, we call the feed update function.
while ($line = array_pop($feeds_to_update)) {
foreach ($feeds_to_update as $feed) {
if($debug) _debug("Base feed: $feed");
if($debug) _debug("Feed: " . $line["feed_url"] . ", " . $line["last_updated"]);
//update_rss_feed($link, $line["id"], true);
update_rss_feed($link, $line["id"], true);
// since we have the data cached, we can deal with other feeds with the same url
$tmp_result = db_query($link, "SELECT ttrss_feeds.feed_url,ttrss_feeds.id,last_updated
FROM ttrss_feeds, ttrss_users WHERE
ttrss_users.id = ttrss_feeds.owner_uid AND
feed_url = '".db_escape_string($link, $feed)."'
$login_thresh_qpart
ORDER BY feed_url $query_limit");
if (db_num_rows($tmp_result) > 0) {
while ($tline = db_fetch_assoc($tmp_result)) {
if($debug) _debug(" => " . $tline["feed_url"] . ", " . $tline["last_updated"] . ", " . $tline["id"]);
update_rss_feed($link, $tline["id"], true);
}
}
}
require_once "digest.php";