AsyncResult Cleanup

TL;DR

AsyncResult__c records accumulate with every tracked job and are never deleted on their own. Async Lib ships a dormant AsyncResultCleanupBatch. Schedule it once with explicit retention and old records get deleted daily:

Async.batchable(
        new AsyncResultCleanupBatch()
            .failedOlderThanDays(90)
            .othersOlderThanDays(30)
    )
    .asSchedulable()
    .name('AsyncResult Cleanup')
    .cronExpression(new CronBuilder().everyDay(3, 0))
    .schedule();

Nothing runs until you schedule it, and there are no default retention values. Every track you want cleaned must be configured explicitly.

Two Retention Tracks

Failed results are usually the ones you keep around for debugging, so they get their own retention, independent from everything else.

Track	Matches Status__c	Builder method
Failed	FAILED	failedOlderThanDays(Integer days)
The rest	COMPLETED, SKIPPED_DEPENDENCY, SKIPPED_CHAIN_STOPPED, SKIPPED_EXPLICIT, SKIPPED_DISABLED	othersOlderThanDays(Integer days)

Set one track, the other, or both. A track without a configured retention is never touched:

// Delete failed results older than 90 days, keep everything else forever.
new AsyncResultCleanupBatch().failedOlderThanDays(90);

// Delete completed and skipped results older than 30 days, keep failed forever.
new AsyncResultCleanupBatch().othersOlderThanDays(30);

// Keep failed results three times longer than the rest.
new AsyncResultCleanupBatch().failedOlderThanDays(90).othersOlderThanDays(30);

Rules

• Retention days must be greater than zero. failedOlderThanDays(0) or a null value throws an IllegalArgumentException immediately.
• At least one track must be configured. Running the batch with none throws when the batch starts.
• Use a retention of at least a few days so results from long-running or delayed chains are never deleted while their chain is still being reconciled.

Running It Once, Ad Hoc

The same batch works without scheduling, for a one-off purge:

Async.batchable(new AsyncResultCleanupBatch().othersOlderThanDays(30)).execute();

For very large backlogs, raise the batch scope:

Async.batchable(new AsyncResultCleanupBatch().othersOlderThanDays(30))
    .scopeSize(2000)
    .execute();