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Change to avoid a join in notice inbox

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The join in notice_inbox is causing temp-table sorting on identi.ca,
so I'm trying a finer-tuned approach.
This commit is contained in:
Evan Prodromou 2009-04-28 13:07:05 -04:00
parent ce5b98ca01
commit c7105c2af1
3 changed files with 127 additions and 34 deletions
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31
classes/Notice.php
View File

@ -215,6 +215,7 @@ class Notice extends Memcached_DataObject
if (common_config('queue', 'enabled')) {
$notice->blowAuthorCaches();
} else {
common_debug("Blowing caches for new notice.");
$notice->blowCaches();
}
}
@ -285,7 +286,7 @@ class Notice extends Memcached_DataObject
// Clear the user's cache
$cache = common_memcache();
if (!empty($cache)) {
$cache->delete(common_cache_key('user:notices_with_friends:' . $this->profile_id));
$cache->delete(common_cache_key('notice_inbox:by_user:'.$this->profile_id));
}
$this->blowNoticeCache($blowLast);
$this->blowPublicCache($blowLast);
@ -307,9 +308,9 @@ class Notice extends Memcached_DataObject
$member->group_id = $group_inbox->group_id;
if ($member->find()) {
while ($member->fetch()) {
$cache->delete(common_cache_key('user:notices_with_friends:' . $member->profile_id));
$cache->delete(common_cache_key('notice_inbox:by_user:' . $member->profile_id));
if ($blowLast) {
$cache->delete(common_cache_key('user:notices_with_friends:' . $member->profile_id . ';last'));
$cache->delete(common_cache_key('notice_inbox:by_user:' . $member->profile_id . ';last'));
}
}
}
@ -352,9 +353,9 @@ class Notice extends Memcached_DataObject
'WHERE subscription.subscribed = ' . $this->profile_id);
while ($user->fetch()) {
$cache->delete(common_cache_key('user:notices_with_friends:' . $user->id));
$cache->delete(common_cache_key('notice_inbox:by_user:'.$user_id));
if ($blowLast) {
$cache->delete(common_cache_key('user:notices_with_friends:' . $user->id . ';last'));
$cache->delete(common_cache_key('notice_inbox:by_user:'.$user_id.';last'));
}
}
$user->free();
@ -613,6 +614,26 @@ class Notice extends Memcached_DataObject
return $wrapper;
}
function getStreamByIds($ids)
{
$cache = common_memcache();
if (!empty($cache)) {
$notices = array();
foreach ($ids as $id) {
$notices[] = Notice::staticGet('id', $id);
}
return new ArrayWrapper($notices);
} else {
$notice = new Notice();
$notice->whereAdd('id in (' . implode(', ', $ids) . ')');
$notice->orderBy('id DESC');
$notice->find();
return $notice;
}
}
function publicStream($offset=0, $limit=20, $since_id=0, $before_id=0, $since=null)
{

99
classes/Notice_inbox.php
View File

@ -1,7 +1,7 @@
<?php
/*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, Controlez-Vous, Inc.
* Copyright (C) 2008, 2009, Control Yourself, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
@ -21,6 +21,10 @@ if (!defined('LACONICA')) { exit(1); }
require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
// We keep 5 pages of inbox notices in memcache, +1 for pagination check
define('INBOX_CACHE_WINDOW', 101);
class Notice_inbox extends Memcached_DataObject
{
###START_AUTOCODE
@ -38,4 +42,97 @@ class Notice_inbox extends Memcached_DataObject
/* the code above is auto generated do not remove the tag below */
###END_AUTOCODE
function stream($user_id, $offset=0, $limit=20, $since_id=0, $before_id=0, $since=null)
{
$cache = common_memcache();
if (empty($cache) ||
$since_id != 0 || $before_id != 0 || !is_null($since) ||
($offset + $limit) > INBOX_CACHE_WINDOW) {
common_debug('Doing direct DB hit for notice_inbox since the params are screwy.');
return Notice_inbox::_streamDirect($user_id, $offset, $limit, $since_id, $before_id, $since);
}
$idkey = common_cache_key('notice_inbox:by_user:'.$user_id);
$idstr = $cache->get($idkey);
if (!empty($idstr)) {
// Cache hit! Woohoo!
common_debug('Cache hit for notice_inbox.');
$window = explode(',', $idstr);
$ids = array_slice($window, $offset, $limit);
return $ids;
}
$laststr = common_cache_key($idkey.';last');
if (!empty($laststr)) {
common_debug('Cache hit for notice_inbox on last item.');
$window = explode(',', $laststr);
$last_id = $window[0];
$new_ids = Notice_inbox::_streamDirect($user_id, 0, INBOX_CACHE_WINDOW,
$last_id, null, null);
$new_window = array_merge($new_ids, $window);
$new_windowstr = implode(',', $new_window);
$result = $cache->set($idkey, $new_windowstr);
$result = $cache->set($idkey . ';last', $new_windowstr);
$ids = array_slice($new_window, $offset, $limit);
return $ids;
}
$window = Notice_inbox::_streamDirect($user_id, 0, INBOX_CACHE_WINDOW,
null, null, null);
$windowstr = implode(',', $new_window);
$result = $cache->set($idkey, $windowstr);
$result = $cache->set($idkey . ';last', $windowstr);
$ids = array_slice($window, $offset, $limit);
return $ids;
}
function _streamDirect($user_id, $offset, $limit, $since_id, $before_id, $since)
{
$inbox = new Notice_inbox();
$inbox->user_id = $user_id;
if ($since_id != 0) {
$inbox->whereAdd('notice_id > ' . $since_id);
}
if ($before_id != 0) {
$inbox->whereAdd('notice_id < ' . $before_id);
}
if (!is_null($since)) {
$inbox->whereAdd('created > \'' . date('Y-m-d H:i:s', $since) . '\'');
}
$inbox->orderBy('notice_id DESC');
if (!is_null($offset)) {
$inbox->limit($offset, $limit);
}
$ids = array();
if ($inbox->find()) {
while ($inbox->fetch()) {
$ids[] = $inbox->notice_id;
}
}
return $ids;
}
}

29
classes/User.php
View File

@ -451,34 +451,9 @@ class User extends Memcached_DataObject
} else if ($enabled === true ||
($enabled == 'transitional' && $this->inboxed == 1)) {
$cache = common_memcache();
$ids = Notice_inbox::stream($this->id, $offset, $limit, $since_id, $before_id, $since);
if (!empty($cache)) {
# Get the notices out of the cache
$notices = $cache->get(common_cache_key($cachekey));
# On a cache hit, return a DB-object-like wrapper
if ($notices !== false) {
$wrapper = new ArrayWrapper(array_slice($notices, $offset, $limit));
return $wrapper;
}
}
$inbox = Notice_inbox::stream($this->id, $offset, $limit, $since_id, $before_id, $since);
$ids = array();
while ($inbox->fetch()) {
$ids[] = $inbox->notice_id;
}
$inbox->free();
unset($inbox);
return Notice::getStreamByIds($ids, 'user:notices_with_friends:' . $this->id);
return Notice::getStreamByIds($ids);
}
}