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["McLaren, Terry" <address@concealed>]

Hi Betty, et al – Don’t forget there are two ttl settings for membership inclusion, Admin > Edit List Config > Data Source Setup - …

1. Inclusion timeout (ttl)– verify the remote subscriber list members at some time interval. 
2. Inclusion timeout for message distribution (distribution_ttl) – verify the remote subscriber inclusion before a message is sent to the list.

 

#2 Inclusion timeout for message distribution (distribution_ttl) - is the more important setting since it will sync the remote subscriber list ‘before’ a message is sent to the list.   Our default is 5 minutes (300sec), however, we allow the Privileged List Owners to change these settings to whatever time sync they feel is best for their members.   

 

#1 Inclusion timeout (ttl) - Organizations with thousands of lists typically set #1 to a long interval to prevent unnecessary load on the servers (sympa, remote https, ldap,etc…) in an effort to improve efficiency of those services.

 

Hope this helps,

 

Terry McLaren

 

From: address@concealed <address@concealed> On Behalf Of Widerski, Betty
Sent: Monday, August 21, 2023 8:55 AM
To: address@concealed
Subject: [en@sympa] TTL refresh rate change in sympa.conf took 2 old rate refresh cycles before implementing new rate?

 

I discovered the contractors who built our Sympa environment for some reason set the TTL refresh rate to 24 hours (86400 sec). This was unexpected and undesirable. I changed sympa.conf’s  default_ttl to 1800 (30 minutes). I restarted services sympa and wwsympa Aug 17 22:14:44. After restart I checked several lists’ Data sources setup pages and confirmed their “Inclusions timeout (ttl)(default)” setting now said 1800. I expected this meant all lists would now refresh inclusions every 30 minutes.

 

However - it took two cycles of each list’s normal 24-hour refresh cycle before the 30 minute cycle started happening. For example, List A:

        - was refreshing at 12:18 daily

        - After the Aug 17 change/restart, it next refreshed Aug 18 12:18:07

        - It next refreshed Aug 19 12:18:27

        - Only then did it start refreshing every 30 minutes: 12:48, 13:18, etc.

 

Am I missing something about making sympa.conf changes take effect? This is 6.2.70 - the only thing I could find in documentation was that apparently the sympa.conf config is now “ttl” not “default_ttl”

 

Thanks

Betty

 

Betty Widerski

Cloud & Server Engineering – HBS Information Technology

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