From my survey of a few parachains, the definition I find for
MAXIMUM_BLOCK_WEIGHT is often 0.5 seconds of compute :
/// Maximum weight per block pub const MAXIMUM_BLOCK_WEIGHT: Weight = Weight::from_ref_time(WEIGHT_REF_TIME_PER_SECOND) .saturating_div(2) .set_proof_size(cumulus_primitives_core::relay_chain::v2::MAX_POV_SIZE as u64);
While for relay chains like Polkadot & Kusama, it seems to be 2 seconds :
// file : runtime/common/src/lib.rs /// We allow for 2 seconds of compute with a 6 second average block time. /// The storage proof size is not limited so far. pub const MAXIMUM_BLOCK_WEIGHT: Weight = Weight::from_parts(WEIGHT_REF_TIME_PER_SECOND.saturating_mul(2), u64::MAX);
Is there a reason it is so?