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seen Mar 19 at 13:10

Jun
22
accepted Tools for Monitoring Steal Time (st)
Jun
20
awarded  Commentator
Jun
20
comment Tools for Monitoring Steal Time (st)
The spec is right, but does it matter? dual core hyperthreading v. quad-core still show up as 4 CPUs. Should Xen only allocate us 2 CPUs?
Jun
20
comment Tools for Monitoring Steal Time (st)
I added some info about the cores above in the question. These bursts of st are short-lived, but they cause a big impact to our server.
Jun
20
revised Tools for Monitoring Steal Time (st)
added more info
Jun
20
comment Tools for Monitoring Steal Time (st)
still waiting for their support guys to get back to us. Supposedly the "virtual dedicated" concept was to give us a real metal server. It makes scaling, backup and a few other things easier. This is not the first support ticket regarding our load problems, so if this turns out to be the cause, I'll be rather... unhappy.
Jun
20
asked Tools for Monitoring Steal Time (st)
Jun
19
comment Sudden burst in free memory
Oh and no hint of the OOM killer.... lots of memory free.
Jun
19
comment Sudden burst in free memory
I suspect the load afterwards is a backlog of activity. Base load on the server is a steady 2-3% with a 5% average load. I recently brought that down from higher figures by removing spamd, changing awstats jobs etc. The server is a shared web host with pop3 and imap on Dovecot. It's overtaxed, but this kind of performance probelm and this kind of weird memory behaviour is abnormal, even for a server which is under steady load.
Jun
19
comment Sudden burst in free memory
The 'bunch' is the 1.6GB. It's odd. The Swap is 2GB, but mostly unused (50MB occasionally shows up in there). vmstat -SM 3 would be hard to run in a timely fashion. When the system experiences this, sometimes the terminal is unresponsive. Applications: They freeze, we occasionally get Bug: Soft Lockup in the syslog, and their load values get artifically inflated. Everything slowly comes back.
Jun
19
asked Sudden burst in free memory
Jun
6
comment install 2.6.32.59 on squeeze
It looks like the Debian kernel versions threw me for a loop. Like you say, it sounds like 2.6.32-42 of the Debian package contains 2.6.32.59's patches. See unix.stackexchange.com/questions/39621/… for what I'm trying to solve.
Jun
5
asked install 2.6.32.59 on squeeze
May
29
awarded  Tumbleweed
Apr
7
answered Specifying outgoing interface for SSH tunnel
Apr
6
awarded  Teacher
Apr
6
comment Salvage files from ext3 filesystem with physical errors
It's primarily concerned with analysing the structure of the disk and will let you do stuff like manually mount disks, specify filesystem types, manually scan for superblocks, etc. There's another sister utility called "photorec" which looks for signatures of the data. E.g., if a .doc file is on the disk, it will follow the blocks and recover the file even if there is no superblock. Photorec is probably impractical unless you can get better transfer rates or take the dd. I've used these to do data recovery, but I'm not a data recovery professional.
Apr
6
answered Salvage files from ext3 filesystem with physical errors
Mar
30
answered FTP over SSL in AIX (UNIX)
Mar
29
awarded  Promoter