From 81682a605136a6007ded395b787b4902bce86994 Mon Sep 17 00:00:00 2001
From: ranwenjie <ranwenjie@didichuxing.com>
Date: Fri, 26 Mar 2021 13:34:07 +0800
Subject: [PATCH] redis slowlog

---
 2 List/Redis slowlog.md | 66 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 2 List/Redis slowlog.md

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+# Redis slowlog
+
+
+redis中的slowlog使用链表来保存
+
+
+```
+struct redisServer {
+
+    // ...
+
+
+    // 下一条慢查询日志的 ID
+    long long slowlog_entry_id;
+
+
+    // 保存了所有慢查询日志的链表
+    list *slowlog;
+
+
+    // 服务器配置 slowlog-log-slower-than 选项的值
+    long long slowlog_log_slower_than;
+
+
+    // 服务器配置 slowlog-max-len 选项的值
+    unsigned long slowlog_max_len;
+
+
+    // ...
+
+};
+```
+
+
+一条slowlog entry标识
+
+```
+typedef struct slowlogEntry {
+
+
+    // 唯一标识符
+    long long id;
+
+
+    // 命令执行时的时间，格式为 UNIX 时间戳
+    time_t time;
+
+
+    // 执行命令消耗的时间，以微秒为单位
+    long long duration;
+
+
+    // 命令与命令参数
+    robj **argv;
+
+
+    // 命令与命令参数的数量
+    int argc;
+
+
+} slowlogEntry;
+
+```
+
+
+