Async reindex collidates with reindexing from Observers

[magento-hackathon]

Async reindex collidates with reindexing from Observers

[WinstonN]

I do multiple orders a second in my 1.8.1.0 CE store. I have my indexes running every 5 minutes, with 100 events in each run. I also commented out, via a rewrite, the Mage::getResourceSingleton('catalog/product_indexer_price')->reindexProductIds($productIds); call that get's called after each order in Mage_CatalogInventory_Model_Observer::reindexQuoteInventory()

Under System -> Config -> System -> Asynchronous Indexing -> Enable Partial Automatic Indexing = Yes

I never get any deadlocks now. My peaks are 9 orders a second with this configuration

[qx54]

What happens exactly to a sale when a collision happens?
Is this a serious issue?

[Silarn]

This doesn't just happen with Update on Save selected?

[Flyingmana]

It may be worth to mention this in the readme with possible downsides