Planned downtime: OS upgrade

[Dill]

To make things clear, what exactly is the current hypothesis for the lag? (aside from fragmentation of the hard drive)

Is there any way to explain in lay-men's terms?

Also, if you have logs of the server before you did the OS upgrade, have you tried comparing them to current which is laggy?

^

[loftar]

To make things clear, what exactly is the current hypothesis for the lag?

I've explained it previously both in this thread and others, but the concrete symptoms are that individual VFS operations seemingly randomly take Really Long (sometimes up to 20 seconds) to complete, particularly metadata-heavy ones, such as open(), rename(), close() and the like. The problem is that I don't know what they are blocking on, nor how to find that out. Processes running sync() or fsync() calls do seem to have particularly high probability of making other processes block, but they are far from exclusively responsible.

[Dill]

To make things clear, what exactly is the current hypothesis for the lag?

I've explained it previously both in this thread and others, but the concrete symptoms are that individual VFS operations seemingly randomly take Really Long (sometimes up to 20 seconds) to complete, particularly metadata-heavy ones, such as open(), rename(), close() and the like. The problem is that I don't know what they are blocking on, nor how to find that out. Processes running sync() or fsync() calls do seem to have particularly high probability of making other processes block, but they are far from exclusively responsible.

Whats the status on the defrag?

[Saxony4]

Whats the status on the defrag?

I bet it's not even 10% done. These things take time.

[loftar]

Whats the status on the defrag?

It doesn't actually have a "progress bar" or anything, so I don't know. See above for estimates.

[Essentialism]

Next time you make an announced restart saying 15 minutes left,
atleast give us 15 minutes of play-time, instead of < 5 min

[Dill]

Next time you make an announced restart saying 15 minutes left,
atleast give us 15 minutes of play-time, instead of < 5 min

He did give you 15 minutes of play time. Then he shut down the server.

[Essentialism]

Message was received at 0:07, server shut down at 0:18
Divide that by 2 because of the massive lagg -> 5 min

[Saxony4]

Message was received at 0:07, server shut down at 0:18
Divide that by 2 because of the massive lagg -> 5 min

5m.30s actually.

[Essentialism]

How to embarrass yourself in front of the whole HnH community.
Lesson 1 :

Message was received at 0:07, server shut down at 0:18
Divide that by 2 because of the massive lagg -> 5 min

5m.50s actually.