added disk size to the instance table

Author: nayanj98

blog/2026-04-22-spark-vs-fusion-compaction.mdx

@@ -1094,11 +1094,11 @@ In this section, we compare the compaction cost for Spark and Fusion based on th
 
 Before calculating total compaction cost, here are the hourly rates for each instance type used in this benchmark:
 
-| Instance type | Cost per hour (USD) |
-| --- | --- |
-| `c4a-standard-8` | $0.38 |
-| `c4a-highmem-16` | $0.99 |
-| `c4a-standard-32` | $1.60 |
+| Instance type | Disk size | Cost per hour (USD) |
+| --- | --- | --- |
+| `c4a-standard-8` | 100 GB | $0.38 |
+| `c4a-highmem-16` | 100 GB | $0.99 |
+| `c4a-standard-32` | 1000 GB | $1.60 |
 
 Using the compaction infrastructure and total compaction durations from this benchmark: