Tencent Cloud Expert Solutions Architect Practice Questions - Tencent Cloud Certified Expert - Solutions Architect (TCE) Exam

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An application uses TencentDB for Redis (cluster mode) to cache session data. Developers report that KEYS * commands issued during load testing cause production latency spikes. What is the BEST architectural fix?

Increase Redis maxmemory-policy to allkeys-lru so eviction prevents key accumulation Replace KEYS * with SCAN using a cursor with a small COUNT to iterate keys incrementally Shard session data into multiple Redis instances to reduce per-instance key count Enable TencentDB Redis slow-query log and set slowlog-log-slower-than to 0 to capture all commands

Correct Answer:

Replace KEYS * with SCAN using a cursor with a small COUNT to iterate keys incrementally

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