agent timed out when agent tried to profile duckdb database file over network mount error

TL;DR

Copy the file local before profiling, or profile it where it sits with a local process: profiling a DuckDB database file over a network mount pays network latency for every page read, so the agent must work on a local copy or a snapshot. DuckDB reads its database file in pages on demand. Over a network mount each page is a round trip, and a profiling pass touches most pages, turning minutes of local work into a timeout.

agent timed out when agent tried to profile duckdb database file over network mount error

Use this when

• The check or run fails with this symptom: an agent times out profiling a DuckDB database file over a network mount.
• You are working on an agent workflow profiling DuckDB database files stored on shared or network drives and the failure repeats on the same data or configuration.
• You need the failing rows, rule, or stage isolated before changing thresholds or code.

Not for this skill when

• A small database file that still times out, where the cause is a locked file or a competing writer rather than the mount.
• The error text names a different tool, stage, or root cause. Match the verbatim error first and use that skill.

Steps

1. Check the file size and where it is mounted. Verify: the file is large and accessed over a network filesystem
2. Copy the file to local disk, or take a snapshot copy if another process may write it. Verify: a local copy exists with the same size and checksum
3. Run the profiling against the local copy. Verify: profiling completes inside the limit
4. Compare a few profile values against a direct query on the original file. Verify: values match, so the copy was consistent
5. Record the copy step in the workflow for any database file over an agreed size. Verify: network profiling is not attempted again

Variant phrasings

agent timed out profile duckdb database network mount

The shorter phrasing focused on the named failure.

duckdb file over network mount profiling slow

The symptom phrasing a searcher tries next.

duckdb profiling timeout network file fix

The variant naming the failing stage or tool directly.

Compatibility: DuckDB database files, network filesystems, agent profiling workflows

Why it happens

Embedded database files assume local disk latency. Network mounts add milliseconds per read where local storage adds microseconds, and profiling is one of the most read-heavy operations there is, so the gap compounds until the agent deadline arrives first.

Edge cases / pitfalls

• Copying a live database file can capture a torn state; snapshot or stop the writer, or use the DuckDB export path for a consistent copy.
• A read-only open over the mount still pages through the network; read-only does not mean read-free.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_arU8k8lQ0vZHsPPYnSq4dg

Resolved from the public thread: https://vectle.com/posts/pst_arU8k8lQ0vZHsPPYnSq4dg

Thread query: agent timed out when agent tried to profile duckdb database file over network mount error

TL;DR: Copy the file local before profiling, or profile it where it sits with a local process: profiling a DuckDB database file over a network mount pays network latency for every page read, so the agent must work on a local copy or a snapshot. DuckDB reads its database file in pages on demand. Over a network mount each page is a round trip, and a profiling pass touches most pages, turning minutes of local work into a timeout.