🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 65 (from laksa188)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa065.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, meta_canonical AS meta_canonical, ml_categories_json AS ml_categories_json, ml_types_json AS ml_types_json, ml_intent_types_json AS ml_intent_types_json, meta_language AS meta_language, attrs_author AS attrs_author, ifNull(toUnixTimestamp(attrs_publish_time), 0) AS attrs_publish_time, ifNull(toUnixTimestamp(attrs_original_publish_time), 0) AS attrs_original_publish_time, ifNull(attrs_is_republished, 0) AS attrs_is_republished, ifNull(attrs_nr_words, 0) AS attrs_nr_words, ifNull(attrs_boilerpipe_nr_words, 0) AS attrs_boilerpipe_nr_words, ifNull(body_ext_links_number, 0) AS body_ext_links_number, ifNull(body_int_links_number, 0) AS body_int_links_number, ifNull(meta_nofollow, 0) AS meta_nofollow, ifNull(meta_noarchive, 0) AS meta_noarchive, ifNull(props_was_rendered, 0) AS props_was_rendered, ifNull(src_redirect, \'\') AS src_redirect, ifNull(download_time_msec, 0) AS download_time_msec, ifNull(download_ttfb_msec, 0) AS download_ttfb_msec, ifNull(download_size, 0) AS download_size FROM crawler3.page_info_local FINAL PREWHERE int_partition_id = 59 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://labs.ub.uni-frankfurt.de/post/asyncio-and-multiprocessing-1/\')), getAhrefsUnparsedNoserviceFromURL(\'https://labs.ub.uni-frankfurt.de/post/asyncio-and-multiprocessing-1/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/labs.ub.uni-frankfurt.de\/post\/asyncio-and-multiprocessing-1\/","crawl_time":1772238487,"first_indexed_time":1688636547,"http_code":200,"src_unparsed":"de,uni-frankfurt!ub,labs,\/post\/asyncio-and-multiprocessing-1\/ s443","src_root_hash":"16531431506572871865","history_drop_reason":null,"meta_title":"CPU-intensive Python Web Backends with asyncio and multiprocessing, Part I - UBLabs","meta_descriptions":["Python, popular though it is, has a few well-known weaknesses. One of the most well known among serious users of the language is the lack of multicore support for in-process threads. This is because CPython, Python’s standard implementation has a global interpreter lock (often referred to as the GIL). The GIL locks each instance of the interpreter to a single core—a common approach to avoid race conditions in the implementation of language interpreters."],"meta_canonical":null,"ml_categories_json":"{\"\/Computers_and_Electronics\":978,\"\/Computers_and_Electronics\/Programming\":689,\"\/Computers_and_Electronics\/Programming\/Scripting_Languages\":541,\"\/Internet_and_Telecom\":196,\"\/Internet_and_Telecom\/Web_Services\":189,\"\/Internet_and_Telecom\/Web_Services\/Web_Design_and_Development\":177}","ml_types_json":"{\"\/Article\":999,\"\/Article\/Tutorial_or_Guide\":957}","ml_intent_types_json":"{\"Informational\":999}","meta_language":"en","attrs_author":"Aaron Christiansson","attrs_publish_time":1631692800,"attrs_original_publish_time":1631692800,"attrs_is_republished":0,"attrs_nr_words":"1543","attrs_boilerpipe_nr_words":"1419","body_ext_links_number":16,"body_int_links_number":27,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":54,"download_ttfb_msec":45,"download_size":28647}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 65 · Partition 59

laksa065

16531431506572871865

📄

INDEXABLE

✅

CRAWLED

3 months ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	3.2 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property

Value

URL

https://labs.ub.uni-frankfurt.de/post/asyncio-and-multiprocessing-1/

Last Crawled

2026-02-28 00:28:07 (3 months ago)

First Indexed

2023-07-06 09:42:27 (2 years ago)

HTTP Status Code

200

Content

Meta Title

CPU-intensive Python Web Backends with asyncio and multiprocessing, Part I - UBLabs

Meta Description

Python, popular though it is, has a few well-known weaknesses. One of the most well known among serious users of the language is the lack of multicore support for in-process threads. This is because CPython, Python’s standard implementation has a global interpreter lock (often referred to as the GIL). The GIL locks each instance of the interpreter to a single core—a common approach to avoid race conditions in the implementation of language interpreters.

Meta Canonical

null

Boilerpipe Text

heavy column, fetched on demand

Markdown

heavy column, fetched on demand

Readable Markdown

heavy column, fetched on demand

ML Classification

ML Categories

/Computers_and_Electronics		97.8%
/Computers_and_Electronics/Programming		68.9%
/Computers_and_Electronics/Programming/Scripting_Languages		54.1%
/Internet_and_Telecom		19.6%
/Internet_and_Telecom/Web_Services		18.9%
/Internet_and_Telecom/Web_Services/Web_Design_and_Development		17.7%

Raw JSON

{
    "/Computers_and_Electronics": 978,
    "/Computers_and_Electronics/Programming": 689,
    "/Computers_and_Electronics/Programming/Scripting_Languages": 541,
    "/Internet_and_Telecom": 196,
    "/Internet_and_Telecom/Web_Services": 189,
    "/Internet_and_Telecom/Web_Services/Web_Design_and_Development": 177
}

ML Page Types

/Article		99.9%
/Article/Tutorial_or_Guide		95.7%

Raw JSON

{
    "/Article": 999,
    "/Article/Tutorial_or_Guide": 957
}

ML Intent Types

Informational

99.9%

Raw JSON

{
    "Informational": 999
}

Content Metadata

Language

Author

Aaron Christiansson

Publish Time

2021-09-15 08:00:00 (4 years ago)

Original Publish Time

2021-09-15 08:00:00 (4 years ago)

Republished

Word Count (Total)

1,543

Word Count (Content)

1,419

Links

External Links

Internal Links

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Yes

Redirect Target

null

Performance

Download Time (ms)

TTFB (ms)

Download Size (bytes)

28,647

Location

Host ID

65 (laksa065)

Partition ID

Root Hash

16531431506572871865

Unparsed URL

de,uni-frankfurt!ub,labs,/post/asyncio-and-multiprocessing-1/ s443