1
vote
2answers
585 views

High load with low CPU usage and low IO usage on Solaris with ZFS and MySQL

I have a Solaris 10 x86_64 system running MySQL 5.5. Under heavy usage times, we're getting very slow responses from the database: slow queries running into minutes that normally return in sub-second ...
4
votes
1answer
297 views

Why am I getting slow and jumpy ZFS write performance?

I have a 10-disk RAIDZ in Solaris 11.1. Its connected by 8G fibre. I have created a ZVOL, made it available with COMSTAR and mounted it on another machine connected by fibre. When I benchmark it ...
0
votes
2answers
207 views

How to find files with top io on solaris ZFS?

I have a Solaris 10 ZFS based NFS server. The physical disks are more or less at their maximum io rates. Performance is very bad - so we will add spindles. The NFS solely serves as storage for ...
-1
votes
2answers
520 views

How Can I Maximize Apache Performance on my Server - Need Calculations Please [closed]

I have a Sun T5140 server with 8GB of memory and two 4-core T-Series CPU's (128 max threads). This server is a dedicated web server. Based on the premise that I'm willing to allocate 1/2 of the ...
0
votes
1answer
1k views

Weblogic intensive CPU usage

I am using Weblogic 10.3.4 + Oracle DB both on Solaris machines (VM) Unfortunately last week our app hosted on Weblogic became very very slow not being able to serve new users coming (everything ...
2
votes
1answer
368 views

Solaris 10: Drop disk cache? (to benchmark app)

Is there a command to drop the ZFS and UFS disk caches? (Preferably just one folder hierarchy.) I'm trying to tuning the performance settings of an application that read/writes data from a large ...
12
votes
5answers
31k views

High load average, low CPU usage - why?

We're seeing huge performance problems on a web application and we're trying to find the bottleneck. I am not a sysadmin so there is some stuff I don't quite get. Some basic investigation shows the ...
2
votes
2answers
1k views

Why does doing large deletes, copies, moves on my ZFS NAS block all other IOs?

I've got a Solaris 11 ZFS-based NAS device with 12x1TB 7.2k rpm SATA drives in a mirrored configuration. It provides 2 services from the same pool - an NFS server for a small VM farm and a CIFS ...
1
vote
2answers
996 views

Performance issue on solaris 10 zone. Multiple pollsyscalls

We have slow running JAVA program on a Solaris 10 Zone. I ran a truss on the pid and noticed following messages getting generated even when program is not doing anything: pollsys(0x00000000, 0, ...
3
votes
2answers
4k views

iostat on Solaris with ZFS - why is wait and %w always zero?

We have a busy server, chocking under a high IO load, at least, that's the feeling I have. Output from iostat -xz looks like this: extended device statistics device ...
3
votes
1answer
812 views

COMSTAR and ZFS zvol giving bursty write pattern

I've just built a small NAS/SAN box and am doing some testing with it. Configuration is: 2GB RAM 2x Opteron 265s Iwill DK8N 5x500GB SATA drives (1 spare, rest mirrored) = 1TB usable space Emulex ...
0
votes
2answers
116 views

solaris performances on comparable Sun / Dell / HP boxes

I understand this might be a little vague, but has anyone conducted some study of the performances of Solaris OS running on comparable (same CPU / RAM) boxes made by Sun, Dell, and HP ? we're all Sun ...
1
vote
2answers
1k views

use of tcp_delack_min on redhat linux (kernel 2.6.18)

we're moving from Solaris to Redhat Linux, and trying to duplicate our low-latency setup, that, on solaris, includes the ndd settings related to TCP NO DELAY, and NAGLE ALGORITHM. I got the impression ...
4
votes
5answers
4k views

Tracing slow Java I/O in Solaris 10

We have a Java application which is significantly slower in Solaris 10 server than in Windows PC. We have profiled (-Xprof) the application and observed that UnixFileSystem.getBooleanAttributes0 ...
0
votes
2answers
608 views

Disk I/O issue with Solaris Zone

I m not even sure if this is an issue but before I dig deeper I wanted to check if it really is one. I have a Sun Solaris server running Solaris 10 with 2 non-global zones on it. Is there a problem ...
1
vote
1answer
748 views

Solaris TCP/IP performance tuning

I am trying to tune a high message traffic system running on Solaris. The architecture is a large number (600) of clients which connect via TCP to a big Solaris server and then send/receive relatively ...
-1
votes
2answers
448 views

monitoring TCP/IP performance on Solaris

I am trying to tune a high message traffic system running on Solaris. The architecture is a large number (600) of clients which connect via TCP to a big Solaris server and then send/receive ...
0
votes
1answer
490 views

Solaris PerfMon Thresholds / Context Switching?

I've got a project that involves installing s/w on Solaris 10, with little else on it. (Tomcat, no traffic other then moi, etc.) Installs go pretty slow (impatient developer time). In looking at ...
1
vote
4answers
230 views

I need an OpenSolaris/Solaris book or documentation recommendation, performance/internals related

Can anyone recommend a good book or set of documents specifically about what OpenSolaris or Solaris is doing internally? I was reading this post and saw a comment that said "On Solaris it was/is ...
2
votes
3answers
11k views

How to monitor Solaris network interface bandwidth?

I would like to see x MB/s, like freebsd has ifstat command which is pretty cool. I need something similar
1
vote
9answers
1k views

Remote performance monitoring for Solaris and Windows

I have a python framework that I've created to run performance tests in a mixed server environment of Windows, Linux and Solaris. I'm looking for a way to remotely gather performance data for the CPU, ...
1
vote
2answers
236 views

OpenSolaris/x86 responding sluggishly - frequent freezing

The system starts up fine, and for about 5 minutes (est.) things are fine. Then the system starts to get very sluggish ("choppy"): the mouse will freeze for two or three seconds, then release for ...