🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 89 (from laksa027)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa089.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 = 57 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://clickhouse.com/docs/optimize/query-optimization\')), getAhrefsUnparsedNoserviceFromURL(\'https://clickhouse.com/docs/optimize/query-optimization\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/clickhouse.com\/docs\/optimize\/query-optimization","crawl_time":1776711135,"first_indexed_time":1740098287,"http_code":200,"src_unparsed":"com,clickhouse!\/docs\/optimize\/query-optimization s443","src_root_hash":"12633450985039531489","history_drop_reason":null,"meta_title":"Guide for query optimization | ClickHouse Docs","meta_descriptions":["A simple guide for query optimization that describe common path to improve query performance"],"meta_canonical":null,"ml_categories_json":"{\"\/Internet_and_Telecom\":570,\"\/Computers_and_Electronics\":568,\"\/Internet_and_Telecom\/Web_Services\":566,\"\/Computers_and_Electronics\/Software\":510,\"\/Internet_and_Telecom\/Web_Services\/Web_Design_and_Development\":440,\"\/Computers_and_Electronics\/Software\/Software_Utilities\":387}","ml_types_json":"{\"\/Article\":967,\"\/Article\/Tutorial_or_Guide\":962}","ml_intent_types_json":"{\"Informational\":999}","meta_language":"en","attrs_author":null,"attrs_publish_time":0,"attrs_original_publish_time":1740098287,"attrs_is_republished":0,"attrs_nr_words":"5165","attrs_boilerpipe_nr_words":"4565","body_ext_links_number":9,"body_int_links_number":112,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":162,"download_ttfb_msec":156,"download_size":22525}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 89 · Partition 57

laksa089

12633450985039531489

📄

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`	1.5 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://clickhouse.com/docs/optimize/query-optimization

Last Crawled

2026-04-20 18:52:15 (1 month ago)

First Indexed

2025-02-21 00:38:07 (1 year ago)

HTTP Status Code

200

Content

Meta Title

Guide for query optimization | ClickHouse Docs

Meta Description

A simple guide for query optimization that describe common path to improve query performance

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

/Internet_and_Telecom		57.0%
/Computers_and_Electronics		56.8%
/Internet_and_Telecom/Web_Services		56.6%
/Computers_and_Electronics/Software		51.0%
/Internet_and_Telecom/Web_Services/Web_Design_and_Development		44.0%
/Computers_and_Electronics/Software/Software_Utilities		38.7%

Raw JSON

{
    "/Internet_and_Telecom": 570,
    "/Computers_and_Electronics": 568,
    "/Internet_and_Telecom/Web_Services": 566,
    "/Computers_and_Electronics/Software": 510,
    "/Internet_and_Telecom/Web_Services/Web_Design_and_Development": 440,
    "/Computers_and_Electronics/Software/Software_Utilities": 387
}

ML Page Types

/Article		96.7%
/Article/Tutorial_or_Guide		96.2%

Raw JSON

{
    "/Article": 967,
    "/Article/Tutorial_or_Guide": 962
}

ML Intent Types

Informational

99.9%

Raw JSON

{
    "Informational": 999
}

Content Metadata

Language

Author

null

Publish Time

not set

Original Publish Time

2025-02-21 00:38:07 (1 year ago)

Republished

Word Count (Total)

5,165

Word Count (Content)

4,565

Links

External Links

Internal Links

112

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Yes

Redirect Target

null

Performance

Download Time (ms)

162

TTFB (ms)

156

Download Size (bytes)

22,525

Location

Host ID

89 (laksa089)

Partition ID

Root Hash

12633450985039531489

Unparsed URL

com,clickhouse!/docs/optimize/query-optimization s443