DBSIZE takes time in minutes and keyspace info missing when SSD storage tier is enabled

[shahyash2609]

Describe the bug

When running Garnet v1.0.87 with SSD storage tier enabled, the DBSIZE command becomes extremely slow (5-10 minutes) after loading data. Additionally, the INFO command does not show any keyspace section, even though keys exist in SSD tier.

• This issue is consistently reproducible.

Steps to reproduce the bug

1. Start Garnet on a GCP C4D-HighMem-64 machine with the following configuration:

{
  "Port": 6379,
  "Address": "0.0.0.0",
  "MemorySize": "16g",
  "PageSize": "32m",
  "SegmentSize": "4g",
  "IndexSize": "16g",
  "IndexMaxSize": "64g",
  "IndexResizeFrequencySecs": 30,
  "IndexResizeThreshold": 65,
  "EnableReadCache": true,
  "ReadCacheMemorySize": "420g",
  "ReadCachePageSize": "2m",
  "DisableObjects": true,
  "EnableStorageTier": true,
  "LogDir": "/mnt/localssd/garnet/log",
  "CheckpointDir": "/mnt/localssd/garnet/ckpt",
  "Recover": true,
  "EnableAOF": false,
  "CompactionFrequencySecs": 0,
  "LogLevel": "Information",
  "MetricsSamplingFrequency": 10
}

2. Load ~1.2 GB of data into the SSD tier using:

docker run --rm \
  --cpus="$(nproc)" \
  --memory="$(free -m | awk '/^Mem:/{print int($2*0.95)"m"}')" \
  --network host \
  redislabs/memtier_benchmark:latest \
  -d 256000 \
  --distinct-client-seed \
  -h <garnet_host> \
  --ratio 1:0 \
  --key-maximum 300000000 \
  -c 15 -t "$(nproc)" \
  --test-time 1000

3. After load is complete:
   • Run DBSIZE → takes 5-10 minutes
   • Run INFO → keyspace section is missing

Expected behavior

• DBSIZE should return quickly without long blocking durations.
• INFO should display keyspace details even when keys are stored in SSD tier.

Screenshots

Release version

v1.0.87

IDE

N/A (server-side issue)

OS version

Ubuntu 24.04.3 LTS

Additional context

No response