Opened 13 years ago
Closed 13 years ago
#9562 closed Bug Report (Fixed)
NFS disk usage display can hang frontend
| Reported by: | Owned by: | danielk | |
|---|---|---|---|
| Priority: | minor | Milestone: | 0.25 |
| Component: | MythTV - General | Version: | 0.24-fixes |
| Severity: | medium | Keywords: | |
| Cc: | Ticket locked: | no |
Description
Updating the disk free stats should be done asynchronously. I've got thousands of recordings across a dozen NFS mounted filesystems, and any theme with a disk free display is totally unusable.
Attachments (1)
Change History (6)
comment:1 Changed 13 years ago by
comment:2 Changed 13 years ago by
You're right, it's already done asynchronously. It looks like the real culprit is a call to QUERY_SG_GETFILELIST[]:[]mbe[]:[]Videos[]:[][]:[]1 from GetArtwork??
Here's a patch to get rid of the misleading comments and useless code in playbackbox.cpp
comment:3 Changed 13 years ago by
| Summary: | disk usage display can hang frontend → NFS disk usage display can hang frontend |
|---|
Sounds like you have your NFS mounts hardmounted rather than softmounted?
comment:4 Changed 13 years ago by
| Milestone: | unknown → 0.25 |
|---|---|
| Owner: | set to danielk |
| Status: | new → assigned |
comment:5 Changed 13 years ago by
| Resolution: | → Fixed |
|---|---|
| Status: | assigned → closed |
This creates a runnable that updates the free space list on the master backend.
The problem with the existing code is that if any mount goes dead each frontend causes one more worker thread to queue up every 15 seconds. If you have 3 frontends 720 threads are started every hour the mount is down. This instead uses one runnable to update the total disk space every 15 seconds for use by all the frontends. If no frontend requests an updated disk space calculation for one minute the runnable shuts down.
Branch: master Changeset: 394c2e82c8723605d939b02a789f068aa8c62d44
Ref: http://www.gossamer-threads.com/lists/mythtv/dev/468372#468372