qdrant / qdrant-client

Python client for Qdrant vector search engine
https://qdrant.tech
Apache License 2.0
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Huge CPU usage of qdrant client when deserializing payload #714

Open GDegrove opened 3 months ago

GDegrove commented 3 months ago

Title: High CPU Usage with Qdrant Async Client for GRPC and REST Endpoints

Description:

We are experiencing significant CPU usage spikes when enabling the Qdrant async client for both GRPC and REST endpoints. By utilizing a profiling tool (Parca), we have identified that a considerable portion of CPU time is being consumed by payload deserialization.

This issue is particularly problematic for applications like recommendation engines that rely on Qdrant as a vector database, as it results in a substantial increase in CPU requirements for our application.

Steps to Reproduce:

  1. Enable Qdrant async client for both GRPC and REST endpoints.
  2. Run the application and perform standard operations.
  3. Monitor CPU usage and analyze with a profiling tool (e.g., Parca).

Expected Behavior:

Actual Behavior:

Environment:

Proposed Solution:

To mitigate the high CPU usage, we propose utilizing orjson for JSON serialization and deserialization. orjson is known for its performance benefits compared to the standard JSON library in Python. By replacing the current deserialization process with orjson, we anticipate a reduction in CPU overhead.

Additional Context: This CPU overhead is posing a challenge in deploying Qdrant in resource-constrained environments. Any guidance or fixes to address this issue would be greatly appreciated.

joein commented 3 months ago

hi @GDegrove

just to be sure, could you also provide the version of pydantic you're using?

GDegrove commented 3 months ago

hi @GDegrove

just to be sure, could you also provide the version of pydantic you're using?

We are using pydantic 2, for exactitude version = "2.8.2"

joein commented 3 months ago

We'll try to look into it, thanks for pointing it out

arthur-st commented 2 months ago

Pydantic doesn't use the json package from the standard library for handling de/serialization. Instead, it handles that internally.