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fix(backend): memory leak in memory caches (#14363)

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* encapsulate `MemoryKVCache<T>`

* remove infinity caches

* encapsulate other caches

* add missing awaits to internally synchronize caches

* implement pull-through caching

* tune cache lifetimes

* optimize cache GC by stopping early

* summarize changes in CHANGELOG.md

* Fix timeout comments

Co-authored-by: かっこかり <67428053+kakkokari-gtyih@users.noreply.github.com>

* add comments about awaiting the redis write

---------

Co-authored-by: かっこかり <67428053+kakkokari-gtyih@users.noreply.github.com>
This commit is contained in:
Hazel K
2024-08-18 00:34:01 -04:00
committed by GitHub
parent 3cd5f86510
commit 9ce44b24b8
12 changed files with 101 additions and 84 deletions
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12
packages/backend/src/core/CacheService.ts
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@@ -56,10 +56,10 @@ export class CacheService implements OnApplicationShutdown {
) {
//this.onMessage = this.onMessage.bind(this);
this.userByIdCache = new MemoryKVCache<MiUser>(Infinity);
this.localUserByNativeTokenCache = new MemoryKVCache<MiLocalUser | null>(Infinity);
this.localUserByIdCache = new MemoryKVCache<MiLocalUser>(Infinity);
this.uriPersonCache = new MemoryKVCache<MiUser | null>(Infinity);
this.userByIdCache = new MemoryKVCache<MiUser>(1000 * 60 * 5); // 5m
this.localUserByNativeTokenCache = new MemoryKVCache<MiLocalUser | null>(1000 * 60 * 5); // 5m
this.localUserByIdCache = new MemoryKVCache<MiLocalUser>(1000 * 60 * 5); // 5m
this.uriPersonCache = new MemoryKVCache<MiUser | null>(1000 * 60 * 5); // 5m
this.userProfileCache = new RedisKVCache<MiUserProfile>(this.redisClient, 'userProfile', {
lifetime: 1000 * 60 * 30, // 30m
@@ -135,14 +135,14 @@ export class CacheService implements OnApplicationShutdown {
if (user == null) {
this.userByIdCache.delete(body.id);
this.localUserByIdCache.delete(body.id);
for (const [k, v] of this.uriPersonCache.cache.entries()) {
for (const [k, v] of this.uriPersonCache.entries) {
if (v.value?.id === body.id) {
this.uriPersonCache.delete(k);
}
}
} else {
this.userByIdCache.set(user.id, user);
for (const [k, v] of this.uriPersonCache.cache.entries()) {
for (const [k, v] of this.uriPersonCache.entries) {
if (v.value?.id === user.id) {
this.uriPersonCache.set(k, user);
}