Quest to Acquire Foglight

Quest Software Inc. agreed to buy closely held Foglight Software of Pleasanton, Calif., for about $86.3 million in stock, the Irvine-based company’s second acquisition this month to add products that complement its database software. With the purchase, Quest will get Foglight’s Real-Time Application Performance System, which monitors applications and automatically corrects problems or alerts system managers. Quest shares rose $2.25 to close at $66.38 on Nasdaq.