protected function executeChecks()
{
$max_allowed_packet = self::loadRawConfigValue('max_allowed_packet');
// This primarily supports setting the filesize limit for MySQL to 8MB,
// which may produce a >16MB packet after escaping.
$recommended_minimum = 32 * 1024 * 1024;
if ($max_allowed_packet < $recommended_minimum) {
$message = pht("MySQL is configured with a small '%s' (%d), " . "which may cause some large writes to fail. Strongly consider raising " . "this to at least %d in your MySQL configuration.", 'max_allowed_packet', $max_allowed_packet, $recommended_minimum);
$this->newIssue('mysql.max_allowed_packet')->setName(pht('Small MySQL "%s"', 'max_allowed_packet'))->setMessage($message)->addMySQLConfig('max_allowed_packet');
}
$modes = self::loadRawConfigValue('sql_mode');
$modes = explode(',', $modes);
if (!in_array('STRICT_ALL_TABLES', $modes)) {
$summary = pht('MySQL is not in strict mode, but using strict mode is strongly ' . 'encouraged.');
$message = pht("On your MySQL instance, the global %s is not set to %s. " . "It is strongly encouraged that you enable this mode when running " . "Phabricator.\n\n" . "By default MySQL will silently ignore some types of errors, which " . "can cause data loss and raise security concerns. Enabling strict " . "mode makes MySQL raise an explicit error instead, and prevents this " . "entire class of problems from doing any damage.\n\n" . "You can find more information about this mode (and how to configure " . "it) in the MySQL manual. Usually, it is sufficient to add this to " . "your %s file (in the %s section) and then restart %s:\n\n" . "%s\n" . "(Note that if you run other applications against the same database, " . "they may not work in strict mode. Be careful about enabling it in " . "these cases.)", phutil_tag('tt', array(), 'sql_mode'), phutil_tag('tt', array(), 'STRICT_ALL_TABLES'), phutil_tag('tt', array(), 'my.cnf'), phutil_tag('tt', array(), '[mysqld]'), phutil_tag('tt', array(), 'mysqld'), phutil_tag('pre', array(), 'sql_mode=STRICT_ALL_TABLES'));
$this->newIssue('mysql.mode')->setName(pht('MySQL %s Mode Not Set', 'STRICT_ALL_TABLES'))->setSummary($summary)->setMessage($message)->addMySQLConfig('sql_mode');
}
if (in_array('ONLY_FULL_GROUP_BY', $modes)) {
$summary = pht('MySQL is in ONLY_FULL_GROUP_BY mode, but using this mode is strongly ' . 'discouraged.');
$message = pht("On your MySQL instance, the global %s is set to %s. " . "It is strongly encouraged that you disable this mode when running " . "Phabricator.\n\n" . "With %s enabled, MySQL rejects queries for which the select list " . "or (as of MySQL 5.0.23) %s list refer to nonaggregated columns " . "that are not named in the %s clause. More importantly, Phabricator " . "does not work properly with this mode enabled.\n\n" . "You can find more information about this mode (and how to configure " . "it) in the MySQL manual. Usually, it is sufficient to change the %s " . "in your %s file (in the %s section) and then restart %s:\n\n" . "%s\n" . "(Note that if you run other applications against the same database, " . "they may not work with %s. Be careful about enabling " . "it in these cases and consider migrating Phabricator to a different " . "database.)", phutil_tag('tt', array(), 'sql_mode'), phutil_tag('tt', array(), 'ONLY_FULL_GROUP_BY'), phutil_tag('tt', array(), 'ONLY_FULL_GROUP_BY'), phutil_tag('tt', array(), 'HAVING'), phutil_tag('tt', array(), 'GROUP BY'), phutil_tag('tt', array(), 'sql_mode'), phutil_tag('tt', array(), 'my.cnf'), phutil_tag('tt', array(), '[mysqld]'), phutil_tag('tt', array(), 'mysqld'), phutil_tag('pre', array(), 'sql_mode=STRICT_ALL_TABLES'), phutil_tag('tt', array(), 'ONLY_FULL_GROUP_BY'));
$this->newIssue('mysql.mode')->setName(pht('MySQL %s Mode Set', 'ONLY_FULL_GROUP_BY'))->setSummary($summary)->setMessage($message)->addMySQLConfig('sql_mode');
}
$stopword_file = self::loadRawConfigValue('ft_stopword_file');
if ($this->shouldUseMySQLSearchEngine()) {
if ($stopword_file === null) {
$summary = pht('Your version of MySQL does not support configuration of a ' . 'stopword file. You will not be able to find search results for ' . 'common words.');
$message = pht("Your MySQL instance does not support the %s option. You will not " . "be able to find search results for common words. You can gain " . "access to this option by upgrading MySQL to a more recent " . "version.\n\n" . "You can ignore this warning if you plan to configure ElasticSearch " . "later, or aren't concerned about searching for common words.", phutil_tag('tt', array(), 'ft_stopword_file'));
$this->newIssue('mysql.ft_stopword_file')->setName(pht('MySQL %s Not Supported', 'ft_stopword_file'))->setSummary($summary)->setMessage($message)->addMySQLConfig('ft_stopword_file');
} else {
if ($stopword_file == '(built-in)') {
$root = dirname(phutil_get_library_root('phabricator'));
$stopword_path = $root . '/resources/sql/stopwords.txt';
$stopword_path = Filesystem::resolvePath($stopword_path);
$namespace = PhabricatorEnv::getEnvConfig('storage.default-namespace');
$summary = pht('MySQL is using a default stopword file, which will prevent ' . 'searching for many common words.');
$message = pht("Your MySQL instance is using the builtin stopword file for " . "building search indexes. This can make Phabricator's search " . "feature less useful.\n\n" . "Stopwords are common words which are not indexed and thus can not " . "be searched for. The default stopword file has about 500 words, " . "including various words which you are likely to wish to search " . "for, such as 'various', 'likely', 'wish', and 'zero'.\n\n" . "To make search more useful, you can use an alternate stopword " . "file with fewer words. Alternatively, if you aren't concerned " . "about searching for common words, you can ignore this warning. " . "If you later plan to configure ElasticSearch, you can also ignore " . "this warning: this stopword file only affects MySQL fulltext " . "indexes.\n\n" . "To choose a different stopword file, add this to your %s file " . "(in the %s section) and then restart %s:\n\n" . "%s\n" . "(You can also use a different file if you prefer. The file " . "suggested above has about 50 of the most common English words.)\n\n" . "Finally, run this command to rebuild indexes using the new " . "rules:\n\n" . "%s", phutil_tag('tt', array(), 'my.cnf'), phutil_tag('tt', array(), '[mysqld]'), phutil_tag('tt', array(), 'mysqld'), phutil_tag('pre', array(), 'ft_stopword_file=' . $stopword_path), phutil_tag('pre', array(), "mysql> REPAIR TABLE {$namespace}_search.search_documentfield;"));
$this->newIssue('mysql.ft_stopword_file')->setName(pht('MySQL is Using Default Stopword File'))->setSummary($summary)->setMessage($message)->addMySQLConfig('ft_stopword_file');
}
}
}
$min_len = self::loadRawConfigValue('ft_min_word_len');
if ($min_len >= 4) {
if ($this->shouldUseMySQLSearchEngine()) {
$namespace = PhabricatorEnv::getEnvConfig('storage.default-namespace');
$summary = pht('MySQL is configured to only index words with at least %d ' . 'characters.', $min_len);
$message = pht("Your MySQL instance is configured to use the default minimum word " . "length when building search indexes, which is 4. This means words " . "which are only 3 characters long will not be indexed and can not " . "be searched for.\n\n" . "For example, you will not be able to find search results for words " . "like 'SMS', 'web', or 'DOS'.\n\n" . "You can change this setting to 3 to allow these words to be " . "indexed. Alternatively, you can ignore this warning if you are " . "not concerned about searching for 3-letter words. If you later " . "plan to configure ElasticSearch, you can also ignore this warning: " . "only MySQL fulltext search is affected.\n\n" . "To reduce the minimum word length to 3, add this to your %s file " . "(in the %s section) and then restart %s:\n\n" . "%s\n" . "Finally, run this command to rebuild indexes using the new " . "rules:\n\n" . "%s", phutil_tag('tt', array(), 'my.cnf'), phutil_tag('tt', array(), '[mysqld]'), phutil_tag('tt', array(), 'mysqld'), phutil_tag('pre', array(), 'ft_min_word_len=3'), phutil_tag('pre', array(), "mysql> REPAIR TABLE {$namespace}_search.search_documentfield;"));
$this->newIssue('mysql.ft_min_word_len')->setName(pht('MySQL is Using Default Minimum Word Length'))->setSummary($summary)->setMessage($message)->addMySQLConfig('ft_min_word_len');
}
}
$bool_syntax = self::loadRawConfigValue('ft_boolean_syntax');
if ($bool_syntax != ' |-><()~*:""&^') {
if ($this->shouldUseMySQLSearchEngine()) {
$summary = pht('MySQL is configured to search on fulltext indexes using "OR" by ' . 'default. Using "AND" is usually the desired behaviour.');
$message = pht("Your MySQL instance is configured to use the default Boolean " . "search syntax when using fulltext indexes. This means searching " . "for 'search words' will yield the query 'search OR words' " . "instead of the desired 'search AND words'.\n\n" . "This might produce unexpected search results. \n\n" . "You can change this setting to a more sensible default. " . "Alternatively, you can ignore this warning if " . "using 'OR' is the desired behaviour. If you later plan " . "to configure ElasticSearch, you can also ignore this warning: " . "only MySQL fulltext search is affected.\n\n" . "To change this setting, add this to your %s file " . "(in the %s section) and then restart %s:\n\n" . "%s\n", phutil_tag('tt', array(), 'my.cnf'), phutil_tag('tt', array(), '[mysqld]'), phutil_tag('tt', array(), 'mysqld'), phutil_tag('pre', array(), 'ft_boolean_syntax=\' |-><()~*:""&^\''));
$this->newIssue('mysql.ft_boolean_syntax')->setName(pht('MySQL is Using the Default Boolean Syntax'))->setSummary($summary)->setMessage($message)->addMySQLConfig('ft_boolean_syntax');
}
}
$innodb_pool = self::loadRawConfigValue('innodb_buffer_pool_size');
$innodb_bytes = phutil_parse_bytes($innodb_pool);
$innodb_readable = phutil_format_bytes($innodb_bytes);
// This is arbitrary and just trying to detect values that the user
// probably didn't set themselves. The Mac OS X default is 128MB and
// 40% of an AWS EC2 Micro instance is 245MB, so keeping it somewhere
// between those two values seems like a reasonable approximation.
$minimum_readable = '225MB';
$minimum_bytes = phutil_parse_bytes($minimum_readable);
if ($innodb_bytes < $minimum_bytes) {
$summary = pht('MySQL is configured with a very small innodb_buffer_pool_size, ' . 'which may impact performance.');
$message = pht("Your MySQL instance is configured with a very small %s (%s). " . "This may cause poor database performance and lock exhaustion.\n\n" . "There are no hard-and-fast rules to setting an appropriate value, " . "but a reasonable starting point for a standard install is something " . "like 40%% of the total memory on the machine. For example, if you " . "have 4GB of RAM on the machine you have installed Phabricator on, " . "you might set this value to %s.\n\n" . "You can read more about this option in the MySQL documentation to " . "help you make a decision about how to configure it for your use " . "case. There are no concerns specific to Phabricator which make it " . "different from normal workloads with respect to this setting.\n\n" . "To adjust the setting, add something like this to your %s file (in " . "the %s section), replacing %s with an appropriate value for your " . "host and use case. Then restart %s:\n\n" . "%s\n" . "If you're satisfied with the current setting, you can safely " . "ignore this setup warning.", phutil_tag('tt', array(), 'innodb_buffer_pool_size'), phutil_tag('tt', array(), $innodb_readable), phutil_tag('tt', array(), '1600M'), phutil_tag('tt', array(), 'my.cnf'), phutil_tag('tt', array(), '[mysqld]'), phutil_tag('tt', array(), '1600M'), phutil_tag('tt', array(), 'mysqld'), phutil_tag('pre', array(), 'innodb_buffer_pool_size=1600M'));
$this->newIssue('mysql.innodb_buffer_pool_size')->setName(pht('MySQL May Run Slowly'))->setSummary($summary)->setMessage($message)->addMySQLConfig('innodb_buffer_pool_size');
}
$conn_w = id(new PhabricatorUser())->establishConnection('w');
$ok = PhabricatorStorageManagementAPI::isCharacterSetAvailableOnConnection('utf8mb4', $conn_w);
if (!$ok) {
$summary = pht('You are using an old version of MySQL, and should upgrade.');
$message = pht('You are using an old version of MySQL which has poor unicode ' . 'support (it does not support the "utf8mb4" collation set). You will ' . 'encounter limitations when working with some unicode data.' . "\n\n" . 'We strongly recommend you upgrade to MySQL 5.5 or newer.');
$this->newIssue('mysql.utf8mb4')->setName(pht('Old MySQL Version'))->setSummary($summary)->setMessage($message);
}
$info = queryfx_one($conn_w, 'SELECT UNIX_TIMESTAMP() epoch');
$epoch = (int) $info['epoch'];
$local = PhabricatorTime::getNow();
$delta = (int) abs($local - $epoch);
if ($delta > 60) {
$this->newIssue('mysql.clock')->setName(pht('Major Web/Database Clock Skew'))->setSummary(pht('This host is set to a very different time than the database.'))->setMessage(pht('The database host and this host ("%s") disagree on the current ' . 'time by more than 60 seconds (absolute skew is %s seconds). ' . 'Check that the current time is set correctly everywhere.', php_uname('n'), new PhutilNumber($delta)));
}
}
