> ## Documentation Index
> Fetch the complete documentation index at: https://ikun.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# 固定大小分块

固定大小分块是一种将文档分割成指定大小的小块的方法，块之间可以设置可选的重叠。当你希望将大型文档处理成更小、更易于管理的部分时，此方法会非常有用。

## 用法

```python theme={null}
from agno.agent import Agent
from agno.document.chunking.fixed import FixedSizeChunking
from agno.knowledge.pdf_url import PDFUrlKnowledgeBase
from agno.vectordb.pgvector import PgVector

db_url = "postgresql+psycopg://ai:ai@localhost:5532/ai"

knowledge_base = PDFUrlKnowledgeBase(
    urls=["https://agno-public.s3.amazonaws.com/recipes/ThaiRecipes.pdf"],
    vector_db=PgVector(table_name="recipes_fixed_size_chunking", db_url=db_url),
    chunking_strategy=FixedSizeChunking(),
)
knowledge_base.load(recreate=False)  # 首次运行后注释掉此行

agent = Agent(
    knowledge_base=knowledge_base,
    search_knowledge=True,
)

agent.print_response("How to make Thai curry?", markdown=True)
```

## 固定大小分块参数

<Snippet file="chunking-fixed-size.mdx" />