make cleanup more aggressive (#64)

* make cleanup more aggressive

* fix test

src/services/repo-cleanup/repo-cleanup.service.test.ts

@@ -50,8 +50,8 @@ describe("RepoCleanupService", () => {
     expect(indexServiceSpy.getLeastUsedRepos).not.toHaveBeenCalled();
     diskUsageService.dataDiskUsage.next({
       total: 10_000,
-      available: 4_000,
-      used: 4_000,
+      available: 8_000,
+      used: 2_000,
     });
     expect(indexServiceSpy.getLeastUsedRepos).not.toHaveBeenCalled();
   });

src/services/repo-cleanup/repo-cleanup.service.ts

@@ -25,7 +25,7 @@ export class RepoCleanupService {
       .pipe(
         filter(x => {
           const freeRatio = x.available / x.total;
-          return freeRatio < 0.1;
+          return freeRatio < 0.5;
         }),
         exhaustMap(() => {
           const count = this.getNumberOfReposToRemove();