diff --git a/content/en/altinity-kb-setup-and-maintenance/altinity-kb-who-ate-my-memory.md b/content/en/altinity-kb-setup-and-maintenance/altinity-kb-who-ate-my-memory.md
index f19df3086d..6c7ff553a3 100644
--- a/content/en/altinity-kb-setup-and-maintenance/altinity-kb-who-ate-my-memory.md
+++ b/content/en/altinity-kb-setup-and-maintenance/altinity-kb-who-ate-my-memory.md
@@ -8,7 +8,7 @@ keywords:
   - clickhouse memory usage
 ---
 
-```
+```sql
 SYSTEM JEMALLOC PURGE;
 
 SELECT 'OS' as group, metric as name, toInt64(value) as val FROM system.asynchronous_metrics WHERE metric like 'OSMemory%'