[OpenIndiana-discuss] VERY slow server performance

[Richard Elling]

On Sep 6, 2012, at 8:08 AM, Roel_D <openindiana at out-side.nl> wrote:

> Reading this it reminds me of the old days where IRQ's were important to
> systems.
> Those days my serial mouse could interfere with my modem. 
> 
> But I thought those days were way back.. 

Interrupt conflicts are syslogged at boot (and other times that the device tree
is shaken). Check /var/adm/messages for clues.
 -- richard

> 
> 
> -----Original Message-----
> From: Ben Taylor [mailto:bentaylor.solx86 at gmail.com] 
> Sent: donderdag 6 september 2012 16:56
> To: Discussion list for OpenIndiana
> Subject: Re: [OpenIndiana-discuss] VERY slow server performance
> 
> On Thu, Sep 6, 2012 at 12:48 AM, Stuart & Shirley <antarctic at sympatico.ca>
> wrote:
>> 
>> Hi - Look for some assistance in improving disk access performance on 
>> my OpenIndiana install.
>> 
>> Wanting to upgrade my server based on OpenSolaris and ZFS to 3TB 
>> drives, I upgraded the OS to OpenIndiana 151a.
>> 
>> Performance is terrible over the network as compared to the previous 
>> OpenSolaris installation. Hardware is identical with the exception of 
>> a second SATA controller (a second identical  Supermicro AOC-SAT2-MV8) 
>> and additional hard drives.
>> 
>> Perhaps related, the USB mouse is virtually none-operational. It will 
>> only update the location of the mouse for about 0.5s out of every 10s. 
>> This has not been an issue, as I usually connect remotely. But still 
>> an indication that all is not well.
>> 
>> Transfers on the  machine, from drive to drive appears about the same 
>> as when running under OpenIndiana - but across the networks it's very
> slow.
>> 
>> Moving a large file from my windows 7 machine across the GbE lan - 
>> transfers at ~11.5MB/s as reported by windows copy.
>> 
>> Using zpool iostat, the write bandwidth is reported as high as 20M.
>> 
>> Now if I run zpool iostat continuously (display every 3 seconds), copy 
>> performance increases - moving into the 16 to 17 MB/s range as 
>> reported by windows.
>> 
>> Copying from one storage pool to another, zpool iostat will report 
>> write bandwidths of 26M.
>> 
>> 
>> My pool configuration is detailed below.
>> 
>> Other's slow performance had been pegged to flow control enabled on 
>> the Ethernet port - this was disabled. It did make a difference, but 
>> not that dramatic.
>> 
>> Any suggestions on how to improve performance and how to fix the mouse 
>> would be greatly appreciated!
>> 
>> Flow control properties:
>> 
>> LINK         PROPERTY        PERM VALUE          DEFAULT        POSSIBLE
>> e1000g0      flowctrl        rw   no             bi
> no,tx,rx,bi
>> 
>> Zpool configurations:
>>  pool: rpool
>> 
>> state: ONLINE
>> 
>>  scan: resilvered 4.63G in 0h7m with 0 errors on Wed Jun  6 22:12:16 
>> 2012
>> 
>> config:
>> 
>>     NAME          STATE     READ WRITE CKSUM
>>     rpool         ONLINE       0     0     0
>>       mirror-0    ONLINE       0     0     0
>>         c3t0d0s0  ONLINE       0     0     0
>>         c3t1d0s0  ONLINE       0     0     0
>> 
>> errors: No known data errors
>> 
>>  pool: tank_12T
>> 
>> state: ONLINE
>>  scan: none requested
>> config:
>>     NAME        STATE     READ WRITE CKSUM
>>     tank_12T    ONLINE       0     0     0
>>       raidz2-0  ONLINE       0     0     0
>>         c3t7d0  ONLINE       0     0     0
>>         c3t3d0  ONLINE       0     0     0
>>         c3t5d0  ONLINE       0     0     0
>>         c3t6d0  ONLINE       0     0     0
>>         c5d0    ONLINE       0     0     0
>>         c8d0    ONLINE       0     0     0
>> 
>> errors: No known data errors
>> 
>>  pool: tank_m
>> 
>> state: ONLINE
>> 
>>  scan: none requested
>> config:
>>     NAME        STATE     READ WRITE CKSUM
>>     tank_m      ONLINE       0     0     0
>>       mirror-0  ONLINE       0     0     0
>>         c3t2d0  ONLINE       0     0     0
>>         c7t6d0  ONLINE       0     0     0
>>         c6d0    ONLINE       0     0     0
>>       mirror-1  ONLINE       0     0     0
>>         c3t4d0  ONLINE       0     0     0
>>         c7t7d0  ONLINE       0     0     0
>>         c4d0    ONLINE       0     0     0
>> 
>> errors: No known data errors
> 
> The mouse interrupt issue is, in my experience, is not a new one.
> 
> I've been seeing this on solaris laptops for as long as I can remember.
> The interesting issue for you is this only happened with the addition of
> another sata controller.  This leads me to believe that there's some rather
> confused logic in the interrupt handler, such that the mouse interrupts
> basically gets preempted by the interrupts between the sata controller as
> data is passed from one controller to the other.
> 
> Ben
> 
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> 
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--
illumos Day & ZFS Day, Oct 1-2, 2012 San Fransisco 
www.zfsday.com
Richard.Elling at RichardElling.com
+1-760-896-4422