I'm a respiratory therapist and I'm not familiar with the "Pillar" surgery for OSA/snoring, it sounds to me like it would probably be painful and not neccessarily take care of the issue. Most snoring is caused by the airway being occluded, most often do to being too heavy or having soft pallette issues. The surgery that phs3194 had is fairly common but, again, not always a cure because it doesn't do anything for the root cause of the problem.
The best thing you can do is to lose weight if you're heavy, getting close to a normal weight for your stature will almost always relieve the OSA problem, in addition to making you healthier in general. If you aren't heavy and having OSA problems then mechanical intervention, like a CPAP (Continuous Positive Airway Pressure) or a BiPAP (Bilevel Positive Airway Pressure) are the easiest solutions and they do not require any sort of surgery. They are simply air pumps which maintain positive airway pressure to keep the airway from occluding (closing). CPAP maintains the same pressure continuously while BiPAP increases the pressure on inspiration and decreases it on expiration. Oxygen can be added to the mix if desaturation is an issue but it is not required for either system to function.
As mentioned, chronic, untreated OSA can cause any number of issues due not only to CO2 retention but, and possibly to a greater degree, sleep deprevation. Your heart works harder and your body never gets the rest it needs. Common symptoms are snoring and excessive daytime sleepiness - falling asleep while driving, at the dinner table, at work, during conversations - anytime you are not busy doing something your body is trying to make up for lack of sleep.
Personally, I would always try to avoid surgery if possible. Speak to your doctor about a sleep study and then you can discuss the different options with all of the facts in front of you. In the mean time, the best thing you can do is the usual array of recommendations - exercise, eat right, maintain a healthy weight, don't smoke, don't overindulge alcohol, go to bed at a reasonable time so your body can get all the rest it needs. If those things do not help/cure your snoring and the OSA that probably accompanies it, then mechanical intervention (CPAP/BiPAP) would be my personal choice for treatment. You put it on when you go to bed and sleep like everyone else and get up awake and refreshed, problem solved.