/* Push a new entry into the slow log.
* This function will make sure to trim the slow log accordingly to the
* configured max length. */
void slowlogPushEntryIfNeeded(robj **argv, int argc, long long duration) {
if (server.slowlog_log_slower_than < 0) return; /* Slowlog disabled */
if (duration >= server.slowlog_log_slower_than)
listAddNodeHead(server.slowlog,slowlogCreateEntry(argv,argc,duration));
/* Remove old entries if needed. */
while (listLength(server.slowlog) > server.slowlog_max_len)
listDelNode(server.slowlog,listLast(server.slowlog));
}
/* Push a new entry into the slow log.
*
* 如果参数 duration 超过服务器设置的上限时间，
* 那么将一个新条目以 FIFO 顺序推入到慢查询日志中。
*
* This function will make sure to trim the slow log accordingly to the
* configured max length.
*
* 根据服务器设置的最大日志长度，可能会对日志进行截断（trim）
*/
void slowlogPushEntryIfNeeded(robj **argv, int argc, long long duration)
{
// 慢查询功能未开启，直接返回
if (server.slowlog_log_slower_than < 0) return; /* Slowlog disabled */
// 如果执行时间超过服务器设置的上限，那么将命令添加到慢查询日志
if (duration >= server.slowlog_log_slower_than)
// 新日志添加到链表表头
listAddNodeHead(server.slowlog,slowlogCreateEntry(argv,argc,duration));
/* Remove old entries if needed. */
// 如果日志数量过多，那么进行删除
while (listLength(server.slowlog) > server.slowlog_max_len)
listDelNode(server.slowlog,listLast(server.slowlog));
}
