Web Interface Slow Response/Failures

[brandongalbraith]

Is anyone experiencing problems with the Proxmox web interface being sluggish and having pages occasionally not load? I have Proxmox installed on two servers, both high-end Dell servers. Sometimes I'll click a link and the browser will sit for minutes with no response and I'll need to click the link again (this is for actions being done against the master, so I don't believe this is being caused by SSH latency between master and slave).

 

[tom]

Is anyone experiencing problems with the Proxmox web interface being sluggish and having pages occasionally not load? I have Proxmox installed on two servers, both high-end Dell servers. Sometimes I'll click a link and the browser will sit for minutes with no response and I'll need to click the link again (this is for actions being done against the master, so I don't believe this is being caused by SSH latency between master and slave).

check the load on the server.

and run 'pveperf' on the console, but only when the server is not under load (pveperf does a very simple benchmark)

 

[brandongalbraith]

Tom,

Here are the pveperf results from our master:

CPU BOGOMIPS: 42563.76
REGEX/SECOND: 676411
HD SIZE: 16.49 GB (/dev/pve/root)
BUFFERED READS: 78.92 MB/sec
AVERAGE SEEK TIME: 5.06 ms
FSYNCS/SECOND: 148.81
DNS EXT: 109.19 ms
DNS INT: 800.65 ms

 

[tom]

Tom,

Here are the pveperf results from our master:

CPU BOGOMIPS: 42563.76
REGEX/SECOND: 676411
HD SIZE: 16.49 GB (/dev/pve/root)
BUFFERED READS: 78.92 MB/sec
AVERAGE SEEK TIME: 5.06 ms
FSYNCS/SECOND: 148.81
DNS EXT: 109.19 ms
DNS INT: 800.65 ms

this indicates that you have no raid cache controller cache enabled (FSYNCS/SECOND: 148.81) which is a huge performance loss. this value should be at least 2000 to 4000 on modern raid controllers/disks.

fix it.

 

[brandongalbraith]

Tom,

The RAID card in question is an LSI Logic SAS1068E. I enabled write caching on the RAID card and rebooted, but I'm still seeing low fsyncs/sec (160). I'm going to continue to troubleshoot though. Does the Proxmox web interface really call that many writes while navigating it from a browser to cause the experience to be sluggish? No VMs exist on the host, and when the interface is sluggish load is close to zero on the server.

Thanks,
-brandon

 

[dietmar]

Does the Proxmox web interface really call that many writes while navigating it from a browser to cause the experience to be sluggish?

No - but obviously there is something totally wrong on that server - fix that first - then we can debug it further.

 

[tom]

Tom,

The RAID card in question is an LSI Logic SAS1068E. I enabled write caching on the RAID card and rebooted, but I'm still seeing low fsyncs/sec (160). I'm going to continue to troubleshoot though. Does the Proxmox web interface really call that many writes while navigating it from a browser to cause the experience to be sluggish? No VMs exist on the host, and when the interface is sluggish load is close to zero on the server.

Thanks,
-brandon

as far as I see this is not a hardware raid controller (http://lsi.com/storage_home/product...ics/lsisas1068e/index.html?remote=1&locale=EN), therefore there is no cache explaining the benchmark results. go for a real hardware raid with BBU.