fixup

system-variables.md

@@ -1791,7 +1791,7 @@ mysql> SELECT job_info FROM mysql.analyze_jobs ORDER BY end_time DESC LIMIT 1;
 - Type: Boolean
 - Default value: `ON`
 - This variable controls whether to enable the [Non-prepared plan cache](/sql-non-prepared-plan-cache.md) feature.
-- Enabling this feature may incur some additional memory usage, so decide whether to enable this feature according to your specific usage scenarios.
+- Enabling this feature may incur some additional memory and CPU overhead, so it's not appropriate for all scenarios and decide whether to enable this feature according to your specific usage scenarios.
 
 ### tidb_enable_non_prepared_plan_cache_for_dml <span class="version-mark">New in v7.1.0</span>