🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 143 (from laksa086)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa143.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 = 61 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://mpaldridge.github.io/math2750/S10-stationary-distributions.html\')), getAhrefsUnparsedNoserviceFromURL(\'https://mpaldridge.github.io/math2750/S10-stationary-distributions.html\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/mpaldridge.github.io\/math2750\/S10-stationary-distributions.html","crawl_time":1775982888,"first_indexed_time":1640239493,"http_code":200,"src_unparsed":"io,github!mpaldridge,\/math2750\/S10-stationary-distributions.html s443","src_root_hash":"2566890010099092343","history_drop_reason":null,"meta_title":"Section 10 Stationary distributions | MATH2750 Introduction to Markov Processes","meta_descriptions":["Lecture notes for the course MATH2750 Introduction to Markov Process at the University of Leeds, 2020–2021"],"meta_canonical":null,"ml_categories_json":"{\"\/Science\":742,\"\/Science\/Mathematics\":728,\"\/Science\/Mathematics\/Statistics\":516,\"\/Jobs_and_Education\":171,\"\/Jobs_and_Education\/Education\":171,\"\/Jobs_and_Education\/Education\/Colleges_and_Universities\":152}","ml_types_json":"{\"\/Document\":559,\"\/Document\/Ebook\":263}","ml_intent_types_json":"{\"Informational\":996}","meta_language":null,"attrs_author":"Matthew Aldridge","attrs_publish_time":0,"attrs_original_publish_time":1640239493,"attrs_is_republished":0,"attrs_nr_words":"5265","attrs_boilerpipe_nr_words":"3186","body_ext_links_number":5,"body_int_links_number":40,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":36,"download_ttfb_msec":36,"download_size":10913}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 143 · Partition 61

laksa143

2566890010099092343

📄

INDEXABLE

✅

CRAWLED

1 month 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`	1.7 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://mpaldridge.github.io/math2750/S10-stationary-distributions.html

Last Crawled

2026-04-12 08:34:48 (1 month ago)

First Indexed

2021-12-23 06:04:53 (4 years ago)

HTTP Status Code

200

Content

Meta Title

Section 10 Stationary distributions | MATH2750 Introduction to Markov Processes

Meta Description

Lecture notes for the course MATH2750 Introduction to Markov Process at the University of Leeds, 2020–2021

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

/Science		74.2%
/Science/Mathematics		72.8%
/Science/Mathematics/Statistics		51.6%
/Jobs_and_Education		17.1%
/Jobs_and_Education/Education		17.1%
/Jobs_and_Education/Education/Colleges_and_Universities		15.2%

Raw JSON

{
    "/Science": 742,
    "/Science/Mathematics": 728,
    "/Science/Mathematics/Statistics": 516,
    "/Jobs_and_Education": 171,
    "/Jobs_and_Education/Education": 171,
    "/Jobs_and_Education/Education/Colleges_and_Universities": 152
}

ML Page Types

/Document		55.9%
/Document/Ebook		26.3%

Raw JSON

{
    "/Document": 559,
    "/Document/Ebook": 263
}

ML Intent Types

Informational

99.6%

Raw JSON

{
    "Informational": 996
}

Content Metadata

Language

null

Author

Matthew Aldridge

Publish Time

not set

Original Publish Time

2021-12-23 06:04:53 (4 years ago)

Republished

Word Count (Total)

5,265

Word Count (Content)

3,186

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)

10,913

Location

Host ID

143 (laksa143)

Partition ID

Root Hash

2566890010099092343

Unparsed URL

io,github!mpaldridge,/math2750/S10-stationary-distributions.html s443