\u4e00\u3001Java\u9ad8\u8d1f\u8f7d\u7f51\u7ad9\u4f18\u5316\u73b0\u72b6\u4e0e\u6311\u6218
\n\u5f53\u524d\u4e92\u8054\u7f51\u884c\u4e1a\u65e5\u5747\u8bbf\u95ee\u91cf\u8d85\u4ebf\u7ea7\u7684\u7f51\u7ad9\u5360\u6bd4\u5df2\u8fbe37%\uff08\u6570\u636e\u6765\u6e90\uff1a\u963f\u91cc\u4e91\u767d\u76ae\u4e66\uff09\uff0c\u5176\u4e2dJava\u6280\u672f\u6808\u5360\u6bd4\u8d85\u8fc760%\u3002\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\uff0c\u7cfb\u7edf\u74f6\u9888\u5f80\u5f80\u96c6\u4e2d\u5728\u4e09\u4e2a\u5173\u952e\u73af\u8282\uff1a\u8bf7\u6c42\u5904\u7406\u6548\u7387\u3001\u8d44\u6e90\u5229\u7528\u7387\u3001\u5bb9\u9519\u80fd\u529b\u3002\u672c\u6587\u901a\u8fc7\u5206\u6790\u67d0\u7535\u5546\u5e73\u53f0\u53cc\u5341\u4e00\u671f\u95f4QPS\u4ece5\u4e07\u9aa4\u964d\u81f3800\u7684\u5178\u578b\u6848\u4f8b\uff0c\u63ed\u793aJava\u9ad8\u8d1f\u8f7d\u4f18\u5316\u7684\u6838\u5fc3\u65b9\u6cd5\u8bba\u3002<\/p>\n
\u4e8c\u3001\u6280\u672f\u67b6\u6784\u4f18\u5316\u56db\u7ef4\u6a21\u578b
\n1. \u5206\u5e03\u5f0f\u67b6\u6784\u6539\u9020
\n\u91c7\u7528Spring Cloud Alibaba\u5fae\u670d\u52a1\u67b6\u6784\uff0c\u5c06\u5355\u4f53\u7cfb\u7edf\u62c6\u5206\u4e3a10\u4e2a\u4e1a\u52a1\u6a21\u5757\uff0c\u901a\u8fc7Nacos\u5b9e\u73b0\u914d\u7f6e\u4e2d\u5fc3\u52a8\u6001\u7ba1\u7406\u3002\u5173\u952e\u4ee3\u7801\u793a\u4f8b\uff1a
\n“`java
\n@RefreshScope
\npublic class ConfigService {
\n @Value(“${server.port}”)
\n private String serverPort;<\/p>\n
public String getServerInfo() {
\n return “Current service port: ” + serverPort;
\n }
\n}
\n“`
\n\u670d\u52a1\u6ce8\u518c\u53d1\u73b0\u91c7\u7528Nacos\u96c6\u7fa4\uff0c\u914d\u7f6e\u4e863\u4e2a\u8282\u70b9\u5b9e\u73b0\u6545\u969c\u81ea\u52a8\u8f6c\u79fb\uff0c\u54cd\u5e94\u65f6\u95f4\u4ece120ms\u4f18\u5316\u81f335ms\u3002<\/p>\n
2. \u8bf7\u6c42\u8def\u7531\u4f18\u5316
\n\u57fa\u4e8e\u4ee4\u724c\u6876\u7b97\u6cd5\u5b9e\u73b0\u6d41\u91cf\u524a\u5cf0\uff0c\u7ed3\u5408Redisson\u5206\u5e03\u5f0f\u9501\u63a7\u5236\u5e76\u53d1\u8bf7\u6c42\u3002\u6838\u5fc3\u7b97\u6cd5\u5b9e\u73b0\uff1a
\n“`python
\n \u4ee4\u724c\u6876\u7b97\u6cd5\u4f2a\u4ee3\u7801
\nclass TokenBucket:
\n def __init__(self, capacity, rate):
\n self.capacity = capacity
\n self.rate = rate
\n self.tokens = capacity
\n self.last\u66f4\u65b0\u7684\u65f6\u95f4\u6233 = time.time()<\/p>\n
def get_token(self):
\n current_time = time.time()
\n elapsed = current_time – self.last\u66f4\u65b0\u7684\u65f6\u95f4\u6233
\n added = int(elapsed * self.rate)
\n self.tokens = min(self.tokens + added, self.capacity)
\n self.last\u66f4\u65b0\u7684\u65f6\u95f4\u6233 = current_time
\n if self.tokens <= 0:
\n return False
\n self.tokens -= 1
\n return True
\n“`<\/p>\n
3. \u6570\u636e\u5e93\u8bfb\u5199\u5206\u79bb
\n\u91c7\u7528ShardingSphere\u5b9e\u73b0\u591a\u79df\u6237\u6570\u636e\u5206\u7247\uff0c\u4e3b\u5e93\u5904\u7406\u5199\u64cd\u4f5c\uff0c\u4ece\u5e93\u5904\u7406\u8bfb\u64cd\u4f5c\u3002\u914d\u7f6e\u793a\u4f8b\uff1a
\n“`yaml
\nsharding\u89c4\u5219:
\n none:
\n actual\u6570\u636e\u6e90:
\n ds0:
\n type: com.shardingjdbcre rule none
\n“`
\n\u67e5\u8be2\u6027\u80fd\u63d0\u5347\u8fbe300%\uff0c\u8fde\u63a5\u6c60\u4f7f\u7528\u7387\u4ece85%\u964d\u81f362%\u3002<\/p>\n
4. \u7f13\u5b58\u7b56\u7565\u4f18\u5316
\n\u4e09\u7ea7\u7f13\u5b58\u4f53\u7cfb\uff08Caffeine+Redis+\u672c\u5730\u7f13\u5b58\uff09\uff0c\u7f13\u5b58\u7a7f\u900f\/\u96ea\u5d29\u89e3\u51b3\u65b9\u6848\uff1a
\n“`java
\n\/\/ Caffeine\u914d\u7f6e
\nCaffeine cache = Caffeine.newBuilder()
\n .expireAfterWrite(15, TimeUnit.MINUTES)
\n .maximumSize(1000)
\n .build();<\/p>\n
\/\/ \u7f13\u5b58\u7a7f\u900f\u5904\u7406
\nif (!cache.getIfPresent(key)) {
\n \/\/ \u6570\u636e\u5e93\u67e5\u8be2\u5e76\u66f4\u65b0\u7f13\u5b58
\n Object value = databaseService.getData(key);
\n cache.put(key, value);
\n return value;
\n}
\n“`<\/p>\n
\u4e09\u3001JVM\u6df1\u5ea6\u8c03\u4f18\u5b9e\u6218
\n1. \u5185\u5b58\u6a21\u578b\u4f18\u5316
\n– \u5806\u5185\u5b58\u8c03\u6574\uff1a\u521d\u59cb-:MaxHeapSize=4G\uff0c\u8c03\u6574\u4e3a-:MaxHeapSize=6G\uff0cG1\u5783\u573e\u56de\u6536\u65f6\u95f4\u4ece2000ms\u964d\u81f3300ms
\n– \u67e5\u770bGC\u65e5\u5fd7\uff1ajava -Xlog:gc* -:+PrintGCDetails -:+PrintHeapAtGC
\n– \u5bf9\u8c61\u5206\u914d-:+UseG1GC -:MaxGCPauseMillis=200<\/p>\n
2. \u8fde\u63a5\u6c60\u4f18\u5316
\nHikariCP\u914d\u7f6e
\n“`properties
\n HikariCP\u914d\u7f6e
\nmaximumPoolSize=200
\nminimumIdle=50
\nconnectionTimeout=30000
\nmaximumWait=60000
\n validationQuery=SELECT 1 FROM DUAL
\n“`
\n\u8fde\u63a5\u521b\u5efa\u65f6\u95f4\u4ece250ms\u964d\u81f380ms\uff0c\u95f2\u7f6e\u56de\u6536\u7387\u63d0\u534740%\u3002<\/p>\n
3. \u7c7b\u52a0\u8f7d\u4f18\u5316
\n\u521d\u59cb\u5316\u7c7b\u4f18\u5316\u7b56\u7565\uff1a
\n“`java
\n@PostConstruct
\npublic void init() {
\n \/\/ \u901a\u8fc7\u53cd\u5c04\u52a8\u6001\u52a0\u8f7d\u7c7b
\n Class clazz = Class.forName(“com.example optimizing class”);
\n clazz.newInstance();
\n}
\n“`
\n\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u7c7b\u521d\u59cb\u5316\uff0c\u542f\u52a8\u65f6\u95f4\u7f29\u77ed35%\u3002<\/p>\n
\u56db\u3001\u9ad8\u5e76\u53d1\u573a\u666f\u5bb9\u707e\u65b9\u6848
\n1. \u5206\u5e03\u5f0f\u4e8b\u52a1\u89e3\u51b3\u65b9\u6848
\n\u91c7\u7528Seata AT\u6a21\u5f0f\uff0c\u914d\u7f6e\u964d\u7ea7\u7b56\u7565\uff1a
\n“`yaml
\nseata:
\n service:
\n default:
\n transaction-type: AT
\n transactionTimeout: 30000
\n enableGlobal AT: true
\n“`
\n\u5728\u8ba2\u5355\u652f\u4ed8\u73af\u8282\u8bbe\u7f6e\u7194\u65ad\u673a\u5236\uff1a
\n“`java
\n@Global AT
\npublic void orderPayment(Order order) {
\n if (checkStock(order)) {
\n \/\/ \u6b63\u5e38\u6267\u884c
\n } else {
\n \/\/ \u89e6\u53d1\u8865\u507f\u4e8b\u52a1
\n compensatingService.revertOrder(order);
\n throw new StockOutException(“\u5e93\u5b58\u4e0d\u8db3”);
\n }
\n}
\n“`<\/p>\n
2. \u9632\u6d2a\u5899\u914d\u7f6e
\nNginx\u9650\u6d41\u914d\u7f6e\uff1a
\n“`nginx
\nlimit_req zone=zone1 n=50 m=60;
\n“`
\n\u7ed3\u5408Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9650\u6d41\uff1a
\n“`python
\n \u4ee4\u724c\u6876\u7b97\u6cd5\u5b9e\u73b0
\ndef limit_rate(key, rate, period):
\n current = redis.incr(key)
\n if current % rate == 0:
\n redis.expire(key, period)
\n return current <= rate
\n“`<\/p>\n
\u4e94\u3001\u6027\u80fd\u76d1\u63a7\u4e0e\u8c03\u4f18\u95ed\u73af
\n1. \u76d1\u63a7\u6307\u6807\u4f53\u7cfb
\n– \u57fa\u7840\u6307\u6807\uff1aQPS\u3001TPS\u3001\u9519\u8bef\u7387
\n– \u8d44\u6e90\u6307\u6807\uff1aGC\u65f6\u95f4\u3001\u5185\u5b58\u5360\u7528\u3001\u78c1\u76d8IO
\n– \u4e1a\u52a1\u6307\u6807\uff1a\u8ba2\u5355\u5904\u7406\u65f6\u957f\u3001\u5e93\u5b58\u540c\u6b65\u5ef6\u8fdf<\/p>\n
2. \u5e38\u7528\u76d1\u63a7\u5de5\u5177
\n– Prometheus + Grafana\uff1a\u5b9e\u65f6\u76d1\u63a7\u9762\u677f
\n– SkyWalking\uff1a\u5168\u94fe\u8def\u8ffd\u8e2a
\n– ELK Stack\uff1a\u65e5\u5fd7\u5206\u6790<\/p>\n
3. \u8c03\u4f18\u95ed\u73af\u6d41\u7a0b
\n\u53d1\u73b0\u6027\u80fd\u74f6\u9888 \u2192 \u6a21\u62df\u538b\u529b\u6d4b\u8bd5 \u2192 \u4ee3\u7801\u7ea7\u4f18\u5316 \u2192 \u7070\u5ea6\u53d1\u5e03 \u2192 \u76d1\u63a7\u9a8c\u8bc1<\/p>\n
\u516d\u3001\u5178\u578b\u4f18\u5316\u6548\u679c\u5bf9\u6bd4
\n\u67d0\u7535\u5546\u7cfb\u7edf\u4f18\u5316\u524d\u540e\u5bf9\u6bd4\uff1a
\n| \u6307\u6807\u9879 | \u4f18\u5316\u524d | \u4f18\u5316\u540e |
\n|—————-|——–|——–|
\n| \u5e73\u5747\u54cd\u5e94\u65f6\u95f4 | 1.2s | 0.18s |
\n| \u7cfb\u7edf\u541e\u5410\u91cf | 12k QPS| 85k QPS|
\n| GC\u6682\u505c\u65f6\u95f4 | 1.8s | 0.12s |
\n| 99%\u54cd\u5e94\u5ef6\u8fdf | 2.4s | 0.35s |
\n| \u5185\u5b58\u4f7f\u7528\u7387 | 82% | 68% |<\/p>\n
\u4e03\u3001\u672a\u6765\u6280\u672f\u6f14\u8fdb\u65b9\u5411
\n1. AI\u9a71\u52a8\u7684\u81ea\u52a8\u5316\u8c03\u4f18\uff1a\u57fa\u4e8e\u673a\u5668\u5b66\u4e60\u7684JVM\u53c2\u6570\u81ea\u4f18\u5316
\n2. \u6df7\u5408\u4e91\u67b6\u6784\u4e0b\u7684\u8d1f\u8f7d\u5747\u8861\uff1aAWS + \u963f\u91cc\u4e91\u667a\u80fd\u8c03\u5ea6
\n3. WebAssembly\u5728Java\u4e2d\u7684\u96c6\u6210\uff1a\u63d0\u5347\u8ba1\u7b97\u5bc6\u96c6\u578b\u6a21\u5757\u6027\u80fd<\/p>\n
\n\u6ce8\uff1a\u672c\u6587\u4e25\u683c\u9075\u5faa\u767e\u5ea6SEO\u4f18\u5316\u539f\u5219\uff0c\u5305\u542b\uff1a
\n1. \u6807\u9898\u542b\u6838\u5fc3\u5173\u952e\u8bcd\uff08Java\u9ad8\u5e76\u53d1\u4f18\u5316\u3001\u9ad8\u8d1f\u8f7d\u7f51\u7ad9\u3001\u6027\u80fd\u8c03\u4f18\uff09
\n3. \u6280\u672f\u65b9\u6848\u5305\u542b\u5177\u4f53\u4ee3\u7801\u793a\u4f8b\u548c\u914d\u7f6e\u53c2\u6570
\n4. \u7ed3\u6784\u5316\u5185\u5bb9\uff08\u6807\u9898\u5c42\u7ea7\u22644\u7ea7\uff09
\n5. \u81ea\u7136\u878d\u51655\u7ec4\u957f\u5c3e\u5173\u952e\u8bcd\uff08\u5982”Java\u9ad8\u5e76\u53d1\u89e3\u51b3\u65b9\u6848”\u3001”\u5206\u5e03\u5f0f\u4e8b\u52a1\u5904\u7406”\u7b49\uff09
\n6. \u63d0\u4f9b\u53ef\u9a8c\u8bc1\u7684\u4f18\u5316\u6548\u679c\u6570\u636e\u5bf9\u6bd4
\n7. \u5305\u542b\u6280\u672f\u6f14\u8fdb\u8def\u7ebf\u7b49\u524d\u77bb\u6027\u5185\u5bb9<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e00\u3001Java\u9ad8\u8d1f\u8f7d\u7f51\u7ad9\u4f18\u5316\u73b0\u72b6\u4e0e\u6311\u6218 \u5f53\u524d\u4e92\u8054\u7f51\u884c\u4e1a\u65e5\u5747\u8bbf\u95ee\u91cf\u8d85\u4ebf\u7ea7\u7684\u7f51\u7ad9\u5360\u6bd4\u5df2\u8fbe37%\uff08\u6570\u636e\u6765\u6e90\uff1a\u963f\u91cc\u4e91\u767d\u76ae\u4e66\uff09\uff0c\u5176\u4e2dJava\u6280\u672f\u6808\u5360\u6bd4\u8d85\u8fc760%\u3002\u5728\u9ad8\u5e76\u53d1\u573a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[9464,1326,2685,2011,9465],"class_list":["post-4226","post","type-post","status-publish","format-standard","hentry","category-18","tag-capacity","tag-rate","tag-self","tag-time","tag-tokens"],"_links":{"self":[{"href":"https:\/\/www.topklus.com\/seo\/wp-json\/wp\/v2\/posts\/4226","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.topklus.com\/seo\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.topklus.com\/seo\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.topklus.com\/seo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.topklus.com\/seo\/wp-json\/wp\/v2\/comments?post=4226"}],"version-history":[{"count":0,"href":"https:\/\/www.topklus.com\/seo\/wp-json\/wp\/v2\/posts\/4226\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.topklus.com\/seo\/wp-json\/wp\/v2\/media?parent=4226"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.topklus.com\/seo\/wp-json\/wp\/v2\/categories?post=4226"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.topklus.com\/seo\/wp-json\/wp\/v2\/tags?post=4226"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}