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一 |     A Mexican official on Monday confirmed a shocking video that emerged over the weekend of cartel gunmen forcing the drivers of about a dozen tanker trucks to dump their entire loads of gasoline into a field.The official, who was not authorized to be quoted by name, said the incident occurred last week in the border city of Matamoros, across from Brownsville, Texas, and was under investigation.The official said the gunmen had apparently forced the truck drivers to line their parked vehicles up on a dirt road to dump their cargo.Asked about the videos, President Andrés Manuel López Obrador acknowledged “there is resistance from criminals” in the area, long known for cartel violence, adding that “We continue to confront them.”In the video, a presumed member of the cartel can be heard mentioning the Gulf cartel faction known as The Scorpions, and saying all trucks carrying gasoline would suffer the same fate unless “they get in line,” or pay protection money to the gang.In the video, open valves on the bottom of the tankers could be seen spewing gasoline like fire hoses, as armed men looked on. “This is going to happen to all the grasshoppers,” a man's voice can be heard saying, an apparent reference to Mexican gang slang that compares those who “jump” through a cartel's territory to the hoppy insects.Criminals in the border state of Tamaulipas have long drilled into state-owned pipelines to steal fuel, but now an even more complex situation is taking place.Because of cross-border price differentials, it is sometimes profitable to import gasoline from Texas and sell it in Mexican border cities in Tamaulipas. López Obrador's administration has long complained that many of the truckers mislabel their cargo to avoid import tariffs.Others legally import U.S. gasoline, a practice the Mexican government dislikes because it reduces sales for the state-owned oil company.“We are there to protect the citizens of Tamaulipas, so they don't have to buy stolen or smuggled fuel,” López Obrador said Monday.But the Gulf drug cartel apparently demands money from both legal importers and those who seek to avoid paying import duties.One businessman who asked not to be identified for fear of reprisals said the gang is demanding a payment of $500 per truck even to allow legally imported gasoline through the city of Matamoros, an important border crossing.The businessman added that Tamaulipas authorities often provide escorts for tanker trucks precisely to prevent such attacks.It was the latest instance of lawlessness in Matamoros, where in March four Americans were shot at and abducted by a drug gang. The Americans were found days later, two dead, one wounded and without physical injuries.____Follow AP’s coverage of Latin America and the Caribbean at https://apnews.com/hub/latin-america。    

　    一键部署OpenClaw        网站慢，很多时候不是带宽不够，而是数据库查询慢。优化MySQL其实就两件事：加索引和用缓存。    先说索引。没索引的查询就是全表扫描，10万条数据能查出你服务器CPU飙到100%。加了索引，查询速度能提升百倍。    -- MySQL索引优化示例    -- 查看慢查询（找出需要优化的SQL）    SELECT * FROM mysql.slow_log    WHERE start_time > NOW() - INTERVAL 1 DAY    ORDER BY query_time DESC LIMIT 10;    -- 用EXPLAIN分析查询计划    EXPLAIN SELECT * FROM articles    WHERE category_id = 5 AND status = 1    ORDER BY created_at DESC LIMIT 20;    -- 如果type是ALL（全表扫描），就需要加索引    CREATE INDEX idx_category_status_time    ON articles(category_id, status, created_at);    -- 复合索引遵循最左前缀原则    -- 即：查询条件从左到右依次命中索引    再说缓存。领用最多的场景是Redis缓存。把查询结果存到Redis里，下次查询直接从Redis取，不用查数据库。

二 |     # Redis缓存示例（PHP + Redis）    // 先查缓存    $redis = new Redis();    $redis->connect('127.0.0.1', 6379);    $cacheKey = 'article_list_page_' . $page;    $cached = $redis->get($cacheKey);    if ($cached) {    // 缓存命中，直接返回    echo $cached;    } else {    // 缓存未命中，查数据库    $articles = $pdo->query("SELECT * FROM articles ORDER BY id DESC LIMIT 20")->fetchAll();    $html = renderArticles($articles);    // 存入缓存，过期10分钟    $redis->setex($cacheKey, 600, $html);    echo $html;    }    MySQL本身也有查询缓存，在my.cnf里开启就行。

三 | 但注意，数据更新后缓存不会立即失效，对实时性要求高的场景不适合。    # MySQL查询缓存配置（my.cnf）    query_cache_type = 1    query_cache_size = 64M    query_cache_limit = 2M    # InnoDB缓冲池大小（一般设为内存的70%）    innodb_buffer_pool_size = 2G    innodb_log_file_size = 256M    最后，定期清理数据库碎片和日志。数据量大了，碎片会导致查询变慢。每月跑一次OPTIMIZE TABLE就能解决。

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Published on:19:37:40