Use the AlwaysFreePages flag when opening an index

Cargo.lock

@@ -873,7 +873,7 @@ dependencies = [
 [[package]]
 name = "heed"
 version = "0.12.0"
-source = "git+https://github.com/Kerollmops/heed?tag=v0.12.0#6c0b95793a805dc598f05c119494e6c069de0326"
+source = "git+https://github.com/Kerollmops/heed?tag=v0.12.1#8e5dc6d71c8166a8d7d0db059e6e51478942b551"
 dependencies = [
  "byteorder",
  "heed-traits",
@@ -891,12 +891,12 @@ dependencies = [
 [[package]]
 name = "heed-traits"
 version = "0.7.0"
-source = "git+https://github.com/Kerollmops/heed?tag=v0.12.0#6c0b95793a805dc598f05c119494e6c069de0326"
+source = "git+https://github.com/Kerollmops/heed?tag=v0.12.1#8e5dc6d71c8166a8d7d0db059e6e51478942b551"
 
 [[package]]
 name = "heed-types"
 version = "0.7.2"
-source = "git+https://github.com/Kerollmops/heed?tag=v0.12.0#6c0b95793a805dc598f05c119494e6c069de0326"
+source = "git+https://github.com/Kerollmops/heed?tag=v0.12.1#8e5dc6d71c8166a8d7d0db059e6e51478942b551"
 dependencies = [
  "bincode",
  "heed-traits",

benchmarks/Cargo.toml

@@ -11,7 +11,7 @@ milli = { path = "../milli" }
 jemallocator = "0.3.2"
 
 [dev-dependencies]
-heed = { git = "https://github.com/Kerollmops/heed", tag = "v0.12.0" }
+heed = { git = "https://github.com/Kerollmops/heed", tag = "v0.12.1" }
 criterion = { version = "0.3.4", features = ["html_reports"] }
 
 [build-dependencies]

helpers/Cargo.toml

@@ -7,7 +7,7 @@ edition = "2018"
 [dependencies]
 anyhow = "1.0.38"
 byte-unit = { version = "4.0.9", default-features = false, features = ["std"] }
-heed = { git = "https://github.com/Kerollmops/heed", tag = "v0.12.0" }
+heed = { git = "https://github.com/Kerollmops/heed", tag = "v0.12.1" }
 milli = { path = "../milli" }
 stderrlog = "0.5.1"
 structopt = { version = "0.3.21", default-features = false }

http-ui/Cargo.toml

@@ -10,7 +10,7 @@ anyhow = "1.0.38"
 byte-unit = { version = "4.0.9", default-features = false, features = ["std"] }
 crossbeam-channel = "0.5.0"
 grenad = { git = "https://github.com/Kerollmops/grenad.git", rev = "3adcb26" }
-heed = { git = "https://github.com/Kerollmops/heed", tag = "v0.12.0" }
+heed = { git = "https://github.com/Kerollmops/heed", tag = "v0.12.1" }
 meilisearch-tokenizer = { git = "https://github.com/meilisearch/Tokenizer.git", tag = "v0.2.3" }
 memmap = "0.7.0"
 milli = { path = "../milli" }

infos/Cargo.toml

@@ -8,7 +8,7 @@ edition = "2018"
 anyhow = "1.0.38"
 byte-unit = { version = "4.0.9", default-features = false, features = ["std"] }
 csv = "1.1.5"
-heed = { git = "https://github.com/Kerollmops/heed", tag = "v0.12.0" }
+heed = { git = "https://github.com/Kerollmops/heed", tag = "v0.12.1" }
 milli = { path = "../milli" }
 roaring = "0.6.6"
 serde_json = "1.0.62"

milli/Cargo.toml

@@ -14,7 +14,7 @@ flate2 = "1.0.20"
 fst = "0.4.5"
 fxhash = "0.2.1"
 grenad = { git = "https://github.com/Kerollmops/grenad.git", rev = "3adcb26" }
-heed = { git = "https://github.com/Kerollmops/heed", tag = "v0.12.0", default-features = false, features = ["lmdb", "sync-read-txn"] }
+heed = { git = "https://github.com/Kerollmops/heed", tag = "v0.12.1", default-features = false, features = ["lmdb", "sync-read-txn"] }
 human_format = "1.0.3"
 levenshtein_automata = { version = "0.2.0", features = ["fst_automaton"] }
 linked-hash-map = "0.5.4"

milli/src/index.rs

@@ -3,6 +3,7 @@ use std::collections::{HashMap, HashSet};
 use std::path::Path;
 
 use chrono::{DateTime, Utc};
+use heed::flags::Flags;
 use heed::types::*;
 use heed::{Database, PolyDatabase, RoTxn, RwTxn};
 use roaring::RoaringBitmap;
@@ -106,6 +107,7 @@ impl Index {
         use db_name::*;
 
         options.max_dbs(14);
+        unsafe { options.flag(Flags::MdbAlwaysFreePages) };
 
         let env = options.open(path)?;
         let main = env.create_poly_database(Some(MAIN))?;

search/Cargo.toml

@@ -7,7 +7,7 @@ edition = "2018"
 [dependencies]
 anyhow = "1.0.38"
 byte-unit = { version = "4.0.9", default-features = false, features = ["std"] }
-heed = { git = "https://github.com/Kerollmops/heed", tag = "v0.12.0" }
+heed = { git = "https://github.com/Kerollmops/heed", tag = "v0.12.1" }
 log = "0.4.14"
 milli = { path = "../milli" }
 serde_json = "1.0.62"