Revision 33d7c84a7bc3d86211b8e397b1c2d079bdfb6bb4 authored by martoon on 12 October 2023, 13:31:00 UTC, committed by martoon on 09 November 2023, 15:57:30 UTC
At first, I didn't write logs assuming that they will be highly available. Actually they are, and we could log more. So here I at least log the result.
1 parent a371e92
constants.ml
(*****************************************************************************)
(* *)
(* Open Source License *)
(* Copyright (c) 2022 Nomadic Labs, <contact@nomadic-labs.com> *)
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(*****************************************************************************)
(* FIXME: https://gitlab.com/tezos/tezos/-/issues/4458
Better handling of this limitation. *)
let shards_store_lru_size =
(* The size of the LRU is determined by the number of slots we remember in the
cache. Each entry in the cache maintains two open file descriptors (one via
regular file opening and one via mmap on the bitset region). Note that setting
a too high value causes a "Too many open files" error. *)
let number_of_slots = 256 in
let number_of_remembered_levels = 1 in
number_of_slots * number_of_remembered_levels
(* Fewer cache sizes should be enough in practice,
but we cache 50 since each cache entry has quite a small memory footprint. *)
let committee_cache_size = 50
(* The size of the cache of 1024 entries (one per slot) is chosen such
that: if a DAL node stores the shard proofs of 128 slots per level,
the cache will be able to store the proofs for 8 levels, which
should be quite sufficient with the current attestation lag.
A shard proof takes 52 bytes with the current encoding (could be improved
to 48), so the maximum memory footprint of the cache is dominated by (keys
size is negligible):
1024 (cache size) * 2048 (shards per slot) * 52 bytes = 109 mb *)
let shards_proofs_cache_size = 1024
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