🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 107 (from laksa053)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa107.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 = 99 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.analyticsvidhya.com/blog/2024/12/eigenvector-and-eigenvalue/\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.analyticsvidhya.com/blog/2024/12/eigenvector-and-eigenvalue/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.analyticsvidhya.com\/blog\/2024\/12\/eigenvector-and-eigenvalue\/","crawl_time":1777348390,"first_indexed_time":1735557545,"http_code":200,"src_unparsed":"com,analyticsvidhya!www,\/blog\/2024\/12\/eigenvector-and-eigenvalue\/ s443","src_root_hash":"2772082033814679907","history_drop_reason":null,"meta_title":"What is an Eigenvector and Eigenvalue?","meta_descriptions":["Discover eigenvector and eigenvalue, key concepts in linear algebra with applications in PCA, machine learning engineering and more."],"meta_canonical":null,"ml_categories_json":"{\"\/Science\":667,\"\/Science\/Mathematics\":555,\"\/Computers_and_Electronics\":479,\"\/Science\/Mathematics\/Other\":475,\"\/Computers_and_Electronics\/Programming\":262,\"\/Computers_and_Electronics\/Programming\/Development_Tools\":136}","ml_types_json":"{\"\/Article\":999,\"\/Article\/Definitions\":513}","ml_intent_types_json":"{\"Informational\":999}","meta_language":"en","attrs_author":"Janvi Kumari","attrs_publish_time":1735226931,"attrs_original_publish_time":1733011200,"attrs_is_republished":0,"attrs_nr_words":"3314","attrs_boilerpipe_nr_words":"948","body_ext_links_number":9,"body_int_links_number":680,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":1236,"download_ttfb_msec":1100,"download_size":67128}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 107 · Partition 99

laksa107

2772082033814679907

📄

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`	1.2 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://www.analyticsvidhya.com/blog/2024/12/eigenvector-and-eigenvalue/

Last Crawled

2026-04-28 03:53:10 (1 month ago)

First Indexed

2024-12-30 11:19:05 (1 year ago)

HTTP Status Code

200

Content

Meta Title

What is an Eigenvector and Eigenvalue?

Meta Description

Discover eigenvector and eigenvalue, key concepts in linear algebra with applications in PCA, machine learning engineering and more.

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		66.7%
/Science/Mathematics		55.5%
/Computers_and_Electronics		47.9%
/Science/Mathematics/Other		47.5%
/Computers_and_Electronics/Programming		26.2%
/Computers_and_Electronics/Programming/Development_Tools		13.6%

Raw JSON

{
    "/Science": 667,
    "/Science/Mathematics": 555,
    "/Computers_and_Electronics": 479,
    "/Science/Mathematics/Other": 475,
    "/Computers_and_Electronics/Programming": 262,
    "/Computers_and_Electronics/Programming/Development_Tools": 136
}

ML Page Types

/Article		99.9%
/Article/Definitions		51.3%

Raw JSON

{
    "/Article": 999,
    "/Article/Definitions": 513
}

ML Intent Types

Informational

99.9%

Raw JSON

{
    "Informational": 999
}

Content Metadata

Language

Author

Janvi Kumari

Publish Time

2024-12-26 15:28:51 (1 year ago)

Original Publish Time

2024-12-01 00:00:00 (1 year ago)

Republished

Word Count (Total)

3,314

Word Count (Content)

948

Links

External Links

Internal Links

680

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Yes

Redirect Target

null

Performance

Download Time (ms)

1,236

TTFB (ms)

1,100

Download Size (bytes)

67,128

Location

Host ID

107 (laksa107)

Partition ID

Root Hash

2772082033814679907

Unparsed URL

com,analyticsvidhya!www,/blog/2024/12/eigenvector-and-eigenvalue/ s443