#CPU USAGE STUCK AT 100 INSTALL#
#CPU USAGE STUCK AT 100 DRIVERS#

Things ive tried to fix it: 1) Reinstalling dell drivers instead of Win 7 drivers. It then proceeds to start itself again 3) No particular process is using the cpu alot other than wmpnetwrk.exe, yet CPU usage shows 100% and my system becomes really slow 4) System Interrupts = 1.5% Cpu 5) No relevant warnings or errors in event log 6) No unrecognized hardware in device manager. Same thing happens for the next app i open 2) Wmpnetwrk.exe usually has around 30% cpu use until i kill the process.

ie i open notepad > cpu goes and staysВ at 60% until i close it. Some strange things I notice 1) When I open an app the cpu stays pegged at 60%. When iВ add up some of the top processes using CPU they dont come anywhere near 100%. When i look in Task Manager, I cant find any particular process that has High CPU usage.

#CPU USAGE STUCK AT 100 INSTALL#

I have a fresh install of RC1 and my CPU spikes to 100% CPUВ after bootup and wont go back down. after 10/13 4:00, max transaction ID kept growing, now we assume, as mentioned above, is because there're long running transactions.Hi Guys, I desperately need some help!.But CPU usage back to normal at around 10/13 04:00 (we didn't intervene at that time) after 10/13 00:00, auto_vacuum stopped working, and since then CPU stuck at 100%.from 10/12 20:00 to 10/13 00:00, CPU usage grows from 40% to nearly 100%, however, during that time, auto_vacuum works fine, the max transaction ID never exceeded 200 million.the transaction this SQL belongs to normally takes 3ms to 10 ms to execute, given no huge traffic and the databases uses 48 cores, it's hard to believe this amount of traffic can have the database stuck for such a long timeДЄlso, CPU became busier way before the vacuum situation occurred, the images below show the relationship between max transaction ID and CPU usage(the first image used UTC time zone, the second used UTC+8, which I added according UTC time below, I'll use UTC in this question):ДЄs it shows, the CPU usage steadily grown since 10/12 20:00(a small peak around 10/12 16:00 was we running a background job):.AWS's support suspected that this SQL is what responsible for high CPU usage, as it might locked the table.

The CPU problemДЄfter the situation occurred, we check the database's log, didn't found any dead lock or slow query, also during or before that 8 hours, the traffic to our service remain as normal.ДЇrom the second image above, we can see that an +update+ SQL take a lot database's resource. The vacuum problem is relatively easier, as Laurenz kindly pointed out, the reason why vacuum not working is there're long running queries. Then I executed +vacuum + manually, still failed to retrieve dead_tuple. At that time, I check the auto_vacuum execution about these tables, seemed that auto_vacuum service run normally, but every time when it ran, failed to retrieve table's dead_tuple. In normal circumstances, a query like might just take several ms.

Problem 2: When this incident happens, several empty tables that server as FIFO queues in our service, takes enormous time (roughly 500 ms) to execute a simple query: Problem 1: As mentioned above, the most obvious appearance of these problem is database's CPU stuck at 100% for a vary long time, then suddenly back to normal without intervention, as we can see from the two screenshot below(the second image is a screenshot from the database's Performance Insight panel): Thus I post this problem in the forum, any advice is very much welcome. We are using AWS's business support plan, in the past few month, we worked closely with the support team to diagnose the issue, but still haven't found what caused the problem. These situation happened 3 times in the past 4 months. One of our Aurora PostgreSQL database's(48 cores) CPU usage stuck at 100% for nearly 8 hours.

Cpu usage stuck at 100