Jan 11, 2024 | Voltaire era: Parameter committee intermediate stat

The Parameter Committee (interim state) meets on a tri-weekly basis. It discusses all parameters relating to the Cardano protocol including network, technical and economic parameters, providing technical advice and recommendations on updatable parameter settings.

Updated list of the Members (interim state):

Chair: Kevin Hammond
Vice- chair: Alex Moser
Vice- chair: Vijay Bhuvangiri

Advisory Group Heads:
Network group: Neil Davies
Technical group: Markus Gufler
Economic group: Samuel Leathers
Governance group: Adam Rusch

Advisory Group Members:
Network group: Karl Knutson, Matthias Sieber, Marcin Szamotulski
Technical group: Ruslan Dudin, Michael Peyton Jones, Ashish Prajapati
Economic group: Sergio Sanchez, Philip Lazos, Giovanni Gargiulo, Sheng-Nan Li
Governance group: Oscar West, Riley Kilgore, Nicolas Cerny

Communications: Tommy Kammerer, Matthew Capps
Domain experts: Martin Lang, Andrew Westberg
Observers: WIP
Secretary: Joaquín López


The purpose of the Parameter Committee is to provide technical advice and recommendations relating to the updatable protocol parameters, taking into account economic, security, network and other technical considerations, as appropriate to protect the long term sustainability of the Cardano blockchain.

Agenda and Updates:


  • Recap on PCP requests:
    • PCP_utxoCostPerByte_ShawnMcMurdo
    • PCP_K-Parameter_EarnCoinPool
    • PCP_max_tx_ex_mem_PiLanningham
  • Parameter Guardrails
  • Any Other Business


  • The Parameters Committee welcomed the new members of the advisory groups and followed a very simple agenda to recap on the open items that were left from the previous year.
  • In 2023 the Parameter Committee completed PCP-001 with a recommendation to reduce MinPoolCost to 170 and this change took effect on mainnet on the 27th of October, just before the Cardano Summit. Since then the Parameter Committee has been collecting feedback from the SPO community.
  • There are 2 open discussions in the Cardano Forum which haven’t formalized the PCP request. This means that no formal actions are required from the Parameter Committee at this moment but the members of the committee will follow and participate in the conversation to help with the definition of the proposals.
  • There are 3 open PCP requests that have been formalized and the Parameter Committee is actively monitoring and participating in the discussion to get as much information from the community as possible.
  • The Committee members had a discussion about each PCP request and agreed to engage with the community in these discussions by posting comments on the Cardano Forum. In the following weeks, the advisory groups will continue working on these proposals and present their conclusions in the next meeting.
  • The Parameter Guardrails document is in the final stage and the comments provided by the Parameters Committee members will be considered and reflected in the final version. The Committee members now have the opportunity to make a final review and they will follow up to see how and when it will be published and shared with the broader community.

Thanks for the update.

Hi @Joaquin do you have the link where I can formalize the request? Thanks.

Hi @rickymac ! You can request a technical review and recommendation from the Parameter Committee by filling out this template and posting it in PCP_max_block_size_RichardMcCracken. Please tag me in the comment so I get a notification. Thanks!

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I commented on @rickymac’s post about my concerns with increasing the block size.

@Joaquin I would be grateful if you would raise my concerns particularly with the technical group.

A brief explanation of the problem: PCP_max_tx_ex_mem_PiLanningham - #5 by Terminada

A proposed possible solution: PCP_max_tx_ex_mem_PiLanningham - #10 by Terminada

My analysis of a recent block with a breakdown of production, propagation and validation times for 3 machines with different computation speed: PCP_max_tx_ex_mem_PiLanningham - #19 by Terminada

Hi @Terminada I just shared with the technical group these links and we will discuss them with the rest of the committee members in our next meeting. Thank you!

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Thank you!