Solaris IO latency

vvassyukov

Hi! We are using lpar2rrd on VMWare and IBM Power environment, it works great! Recently we have bought a new SPARC M8 server, and sight incorrect IO latency data from solaris ldoms. And also we do not receive data on network traffic from agents.

Pavel

Hi,

lpar2rrd server and OS agent versions.

vvassyukov

LPAR2RRD server and agent version is 6.10

Pavel

Hi,

can you upgrade to the latest 6.11 (server) and 6.11-3 (agent)?

There is a lot of improvements in Solaris like new presentation in the menu tree.

Also several bugs was fixed, it sounds like one of it.

Let us know.

vvassyukov

Of course i will install updates! Thank you!

vvassyukov

Hi, Pavel! I have upgraded lpar2rrd server and agent, now i can see network traffic statistic and new presentation in the menu tree. It looks good! IO latency statistic still incorrect. In the attachment, I outlined my assumptions why this is happening.

Pavel

ok, got it, we need to do this to compute total latency from your iostat output

svc_t = wsvc_t + asvc_t

svc_t:    average response time of transactions, in milliseconds

    The svc_t output reports the overall response time, rather than the service time, of a device. The overall time includes the time that transactions are in queue and the time that transactions are being serviced. The time spent in queue is shown with the -x option in the wsvc_t output column. The time spent servicing transactions is the true service time. Service time is also shown with the -x option and appears in the asvc_t output column of the same report.

wsvc_t:    average service time in wait queue, in milliseconds

asvc_t:    average service time of active transactions, in milliseconds