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2
votes
1answer
837 views

“No buffer space available” on connect

I'm seeing the error message "No buffer space available" when processes call "connect" on a Linux virtual machine. I'm having trouble tracking down the cause - hopefully someone can help! I've ...
2
votes
1answer
187 views

Linux buffer memory always stays at zero

One of my hosted server is a Xen guest running Debian and linux kernel 2.6.32 then 2.6.38. It has been running fine for quite some time (more than a year) but I recently noticed something weird. For ...
2
votes
1answer
403 views

Limit linux buffer usage by process

We have a production server running different process which take advantage of existing linux buffers to improve their performance, such as a mysql server. This server has exhaustive IO load. On this ...
1
vote
1answer
45 views

Is there a way to get current txqueue utilization on e.g. eth0 or tun device?

I have detected drops on my tun0 interface. They seem to have been caused by low txqueuelen setting. Now as I increased the txqueuelen value for the network device and there are no more drops yet - ...
1
vote
1answer
508 views

Mysql crashing due to InnoDB not able to allocate memory

MySQL crashes every now and then due to, I believe, a large request hitting it above the innodb-buffer-pool-size set in my.cnf (currently at 210M), which I needed to set for mysql to start in the ...
2
votes
0answers
112 views

Tcp window size won't go above 130048

I have 2 servers set up with about 80ms latency between them. Both are centos 6 and run a java app that transfers data from on location to another. Both are on 1gbps connections. I have been trying ...
0
votes
0answers
63 views

How do I check network buffer queue size?

I'm currently trying to investigate how queue size varies affect throughput in network. Hence, I've tried googling around but to no avail. Hopefully someone here could shed some light on me. How do ...