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Prune one at a time up to the limit #157

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Merged
mtelvers merged 1 commit into from
Jun 7, 2023
Merged

Prune one at a time up to the limit #157

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9 changes: 5 additions & 4 deletions lib/db_store.ml
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Original file line number Diff line number Diff line change
Expand Up @@ -142,10 +142,9 @@ module Make (Raw : S.STORE) = struct
in
aux id

let prune_batch ?(log=ignore) t ~before limit =
let items = Dao.lru t.dao ~before limit in
let prune_lru ?(log=ignore) t ~before =
let items = Dao.lru t.dao ~before 1 in
let n = List.length items in
Log.info (fun f -> f "Pruning %d items (of %d requested)" n limit);
items |> Lwt_list.iter_s (fun id ->
log id;
Raw.delete t.raw id >|= fun () ->
Expand All @@ -155,16 +154,18 @@ module Make (Raw : S.STORE) = struct
Lwt.return n

let prune ?log t ~before limit =
Log.info (fun f -> f "Pruning %d items" limit);
let rec aux acc limit =
if limit = 0 then Lwt.return acc (* Pruned everything we wanted to *)
else (
prune_batch ?log t ~before limit >>= function
prune_lru ?log t ~before >>= function
| 0 -> Lwt.return acc (* Nothing left to prune *)
| n -> aux (acc + n) (limit - n)
)
in
aux 0 limit >>= fun n ->
Raw.complete_deletes t.raw >>= fun () ->
Log.info (fun f -> f "Pruned %d items" n);
Lwt.return n

let wrap raw =
Expand Down