OpenACS / openacs-4 / packages / xotcl-request-monitor

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Changeset MAIN%3Agustafn%3A20171222131233 does not exist.

Monday 10 Jul 2023
10:53 am

gustafn

improve spelling

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Tuesday 30 May 2023
12:01 pm

gustafn

improved spelling

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    ./throttle_mod-procs.tcl
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Tuesday 24 Jan 2023
5:32 pm

gustafn

Adding one more safety belt for potential DOS attacks

For cases, where request blocking is activated (returning 429 status

code for repeated requests), one more check was added: When such a

block happens more than 15 times in a minute on the same URL from the

same user, more requests for the same URL and user will be blocked

until the minute is over. The user seese the message "This web server

is only open for interactive usage".

Background: While request blocking works well for interactive users,

it might not be sufficient for web clients running wild. Normally,

after a 429, the user can reload the page to receive the content of a

page. This leads to a sequence of requests of interleaved 200 and 429

status codes, which might be ignored by a bot (or ad DOS attack). When

the requested page is slow, this can bring a server to its knees.

When request blocking is deactivated, this change has no effect.

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    ./throttle_mod-procs.tcl
Thursday 22 Dec 2022
3:51 am

gustafn

improve strictness of tests

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Thursday 24 Nov 2022
8:26 pm

gustafn

include request start in long-call listing

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2:36 pm

gustafn

minor updates

most significant changes:

- longer lines kept for long-calls

- adapted size of buffer for long-call analysis

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Friday 04 Nov 2022
9:21 pm

gustafn

check queuing situation for every connection pool

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    ./throttle_mod-procs.tcl
Sunday 30 Oct 2022
1:13 pm

gustafn

Added pool filtering and improved layout for Bootstrap 5

- added filter option for pools on "long-calls" page

- added support for Bootstrap 5

- added adp:icon for parameter

- Bumped version to 0.65

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Saturday 08 Oct 2022
9:57 pm

gustafn

added configurability to watchodg

The pool remapping watchdoc con now be configured with

"-maxWaiting" and "-maxRunning"

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    ./throttle_mod-procs.tcl
Saturday 05 Mar 2022
10:40 am

gustafn

Improve rebustness in error situations.

This change makes sure to always provide initialized aggregated values in case

that "dump read" fails to initialized these.

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    ./throttle_mod-procs.tcl
Friday 25 Feb 2022
3:01 pm

gernst

Make the initial population of the request-monitor counters more robust

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    ./throttle_mod-procs.tcl
Wednesday 05 Jan 2022
3:10 pm

gustafn

use ns_baseunit for time span calculation

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Sunday 03 Oct 2021
7:15 pm

gustafn

improve spelling

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Friday 10 Sep 2021
9:02 pm

gustafn

Add the "/dotlrn" path without tailing slash to the exception list

This will cause just a redirect, but if the server is in a bad state, even this might take long.

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    ./throttle_mod-procs.tcl
Sunday 30 May 2021
9:02 pm

gustafn

reduce verbosity

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    ./throttle_mod-procs.tcl
Thursday 22 Apr 2021
2:37 pm

gustafn

avoid site-map lookups from the DB when the connections is already closed. This avoids hard DB-errors when the URL contains invalid characters

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    ./throttle_mod-procs.tcl
Tuesday 20 Apr 2021
11:37 am

antoniop

Sanitize bogus URLs such as "//" or e.g. dotlrn URL lookup would fail

Not clear if this should happen already at the ns_conn level or somewhere in the site_node api

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Thursday 11 Feb 2021
1:45 pm

antoniop

Fix typo

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Monday 01 Feb 2021
11:47 am

gustafn

make end of options explicit

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Tuesday 26 Jan 2021
10:00 pm

gustafn

add unmapping of slow-pool request for requests mapped via scheduled procedures

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    ./throttle_mod-procs.tcl
Monday 25 Jan 2021
5:56 pm

gustafn

undo slow-pool mapping after some time (default 12h)

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    ./throttle_mod-procs.tcl
Tuesday 12 Jan 2021
4:48 pm

gustafn

improve documentation

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    ./throttle_mod-procs.tcl
Friday 11 Dec 2020
5:31 pm

gustafn

drop FK on community_id for cases, where communities are frequently dropped.

we do not want to loose statistics in these cases

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    ./throttle_mod-procs.tcl
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Friday 27 Nov 2020
11:33 am

gustafn

reduce verbosity (set verbose_blocking per default to 0), improve speed of dump creation

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    ./throttle_mod-procs.tcl
Thursday 26 Nov 2020
6:03 pm

antoniop

New method to cleanup all data associated with a community in the throttle object:

if a community is deleted when a user is accessing it, some leftover information will be kept in the object. At the next request this will be interpreted as the community having been left and the system will try to track this event into request_monitor_community_activities. Depending on who comes first, we might try to insert a tuple in the table for an object that does not exist anymore.

Hence, we use this method to cleanup all community info before the actual deletion in dotlrn (happening only downstream).

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    ./throttle_mod-procs.tcl
Sunday 22 Nov 2020
12:55 am

gustafn

request monitor overhaul:

- new parameter "do_double_click_prevention" (default: on)

When turned off, double click prevention can be selectively

turned off.

- new parameter "monitor_urls" (default: / /register/ /dotlrn/)

track for these URLs performance via minin responsetime plugin

- added upgrade script for removing old parameters

- bump version to 0.60

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12:55 am

gustafn

file callback-proc.tcl was initially added on branch oacs-5-10.

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    ./callback-proc.tcl
Saturday 14 Nov 2020
11:14 am

gustafn

let watchdog send mail to webmaster with data of active requests

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    ./throttle_mod-procs.tcl
Friday 13 Nov 2020
9:13 pm

gustafn

pool_remap_watchdog: new watchdog for potentially stuck processes

This watchdog checks every minute the running jobs and maps very slow

requests to the slow pool (if configured) to avoid that the

default pool is getting filled up with more stuck requests.

This ensures the livelyness of a server.

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    ./throttle_mod-procs.tcl
Sunday 08 Nov 2020
3:03 pm

gustafn

reduce verbosity

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