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Operating Systems Solaris T2000 performance issue
# 1  
Old 02-28-2008
T2000 performance issue

Hi,
I have a T2000 box connected to very slow disks (EMC SAN ATA disks) by a double port hba through a fabric topology. RAID 5 (6+1) configuration.
The issue is using RMAN for backup and validation psent almost twice the time than with a V880 Fire connected the same way.

As with the specification, a T2000 is poor using single threaded processes with constraint on ressources. RMAN is not single threaded like Oracle, is multi processus shring ressources, but with pstack I saw that there is one thread doing the job and all the other threads are for I/O.

Did someone already expect issues with RMAN and T2000 Sun box ?

Thanks
Yann
# 2  
Old 02-28-2008
give us a few more infos about your configuration...
post the output of:

# luxadm -e port
# cfgadm -alo show_SCSI_LUN

then do a "luxadm probe" and put the output behind "Logical Path" in this statement:

# luxadm display "Logical Path"

maybe something in your configuration is faulty and therefore slower...
# 3  
Old 02-29-2008
T2000 performance issue

Thanks !
Here is the information you supply for ...
---------------------------------------------------------------------
T2000 box
# luxadm -e port
/devices/pci@7c0/pci@0/pci@1/pci@0,2/emlx@1/fp@0,0:devctl CONNECTED
/devices/pci@7c0/pci@0/pci@1/pci@0,2/emlx@1,1/fp@0,0:devctl CONNECTED
/devices/pci@7c0/pci@0/pci@1/pci@0,2/emlx@2/fp@0,0:devctl CONNECTED
/devices/pci@7c0/pci@0/pci@1/pci@0,2/emlx@2,1/fp@0,0:devctl CONNECTED
# cfgadm -alo show_SCSI_LUN
Ap_Id Type Receptacle Occupant Condition
c2 fc-fabric connected configured unknown
c2::50060160102006f2,0 disk connected configured unknown
c2::50060160102006f2,1 disk connected configured unknown
c2::50060160102006f2,2 disk connected configured unknown
c2::50060160102006f2,3 disk connected configured unknown
c2::50060160102006f2,4 disk connected configured unknown
c2::50060160102006f2,5 disk connected configured unknown
c2::50060160102006f2,6 disk connected configured unknown
c2::50060160102006f2,7 disk connected configured unknown
c2::50060160102006f2,8 disk connected configured unknown
c2::50060160102006f2,9 disk connected configured unknown
c2::50060160102006f2,10 disk connected configured unknown
c2::50060160102006f2,11 disk connected configured unknown
c2::50060160102006f2,13 disk connected configured unknown
c2::50060160102006f2,14 disk connected configured unknown
c2::500601683020e124,0 disk connected configured unknown
c2::500601683020e124,1 disk connected configured unknown
c2::500601683020e124,2 disk connected configured unknown
c2::50060169102006f2,0 disk connected configured unknown
c2::50060169102006f2,1 disk connected configured unknown
c2::50060169102006f2,2 disk connected configured unknown
c2::50060169102006f2,3 disk connected configured unknown
c2::50060169102006f2,4 disk connected configured unknown
c2::50060169102006f2,5 disk connected configured unknown
c2::50060169102006f2,6 disk connected configured unknown
c2::50060169102006f2,7 disk connected configured unknown
c2::50060169102006f2,8 disk connected configured unknown
c2::50060169102006f2,9 disk connected configured unknown
c2::50060169102006f2,10 disk connected configured unknown
c2::50060169102006f2,11 disk connected configured unknown
c2::50060169102006f2,13 disk connected configured unknown
c2::50060169102006f2,14 disk connected configured unknown
c3 fc-fabric connected configured unknown
c3::500601603020e124,0 disk connected configured unknown
c3::500601603020e124,1 disk connected configured unknown
c3::500601603020e124,2 disk connected configured unknown
c3::50060161102006f2,0 disk connected configured unknown
c3::50060161102006f2,1 disk connected configured unknown
c3::50060161102006f2,2 disk connected configured unknown
c3::50060161102006f2,3 disk connected configured unknown
c3::50060161102006f2,4 disk connected configured unknown
c3::50060161102006f2,5 disk connected configured unknown
c3::50060161102006f2,6 disk connected configured unknown
c3::50060161102006f2,7 disk connected configured unknown
c3::50060161102006f2,8 disk connected configured unknown
c3::50060161102006f2,9 disk connected configured unknown
c3::50060161102006f2,10 disk connected configured unknown
c3::50060161102006f2,11 disk connected configured unknown
c3::50060161102006f2,13 disk connected configured unknown
c3::50060161102006f2,14 disk connected configured unknown
c3::50060168102006f2,0 disk connected configured unknown
c3::50060168102006f2,1 disk connected configured unknown
c3::50060168102006f2,2 disk connected configured unknown
c3::50060168102006f2,3 disk connected configured unknown
c3::50060168102006f2,4 disk connected configured unknown
c3::50060168102006f2,5 disk connected configured unknown
c3::50060168102006f2,6 disk connected configured unknown
c3::50060168102006f2,7 disk connected configured unknown
c3::50060168102006f2,8 disk connected configured unknown
c3::50060168102006f2,9 disk connected configured unknown
c3::50060168102006f2,10 disk connected configured unknown
c3::50060168102006f2,11 disk connected configured unknown
c3::50060168102006f2,13 disk connected configured unknown
c3::50060168102006f2,14 disk connected configured unknown
c4 fc-fabric connected configured unknown
c4::50060160102006f2,0 disk connected configured unknown
c4::50060160102006f2,1 disk connected configured unknown
c4::50060160102006f2,2 disk connected configured unknown
c4::50060160102006f2,3 disk connected configured unknown
c4::50060160102006f2,4 disk connected configured unknown
c4::50060160102006f2,5 disk connected configured unknown
c4::50060160102006f2,6 disk connected configured unknown
c4::50060160102006f2,7 disk connected configured unknown
c4::50060160102006f2,8 disk connected configured unknown
c4::50060160102006f2,9 disk connected configured unknown
c4::50060160102006f2,10 disk connected configured unknown
c4::50060160102006f2,11 disk connected configured unknown
c4::50060160102006f2,13 disk connected configured unknown
c4::50060160102006f2,14 disk connected configured unknown
c4::500601683020e124,0 disk connected configured unknown
c4::500601683020e124,1 disk connected configured unknown
c4::500601683020e124,2 disk connected configured unknown
c4::50060169102006f2,0 disk connected configured unknown
c4::50060169102006f2,1 disk connected configured unknown
c4::50060169102006f2,2 disk connected configured unknown
c4::50060169102006f2,3 disk connected configured unknown
c4::50060169102006f2,4 disk connected configured unknown
c4::50060169102006f2,5 disk connected configured unknown
c4::50060169102006f2,6 disk connected configured unknown
c4::50060169102006f2,7 disk connected configured unknown
c4::50060169102006f2,8 disk connected configured unknown
c4::50060169102006f2,9 disk connected configured unknown
c4::50060169102006f2,10 disk connected configured unknown
c4::50060169102006f2,11 disk connected configured unknown
c4::50060169102006f2,13 disk connected configured unknown
c4::50060169102006f2,14 disk connected configured unknown
c5 fc-fabric connected configured unknown
c5::500601603020e124,0 disk connected configured unknown
c5::500601603020e124,1 disk connected configured unknown
c5::500601603020e124,2 disk connected configured unknown
c5::50060161102006f2,0 disk connected configured unknown
c5::50060161102006f2,1 disk connected configured unknown
c5::50060161102006f2,2 disk connected configured unknown
c5::50060161102006f2,3 disk connected configured unknown
c5::50060161102006f2,4 disk connected configured unknown
c5::50060161102006f2,5 disk connected configured unknown
c5::50060161102006f2,6 disk connected configured unknown
c5::50060161102006f2,7 disk connected configured unknown
c5::50060161102006f2,8 disk connected configured unknown
c5::50060161102006f2,9 disk connected configured unknown
c5::50060161102006f2,10 disk connected configured unknown
c5::50060161102006f2,11 disk connected configured unknown
c5::50060161102006f2,13 disk connected configured unknown
c5::50060161102006f2,14 disk connected configured unknown
c5::50060168102006f2,0 disk connected configured unknown
c5::50060168102006f2,1 disk connected configured unknown
c5::50060168102006f2,2 disk connected configured unknown
c5::50060168102006f2,3 disk connected configured unknown
c5::50060168102006f2,4 disk connected configured unknown
c5::50060168102006f2,5 disk connected configured unknown
c5::50060168102006f2,6 disk connected configured unknown
c5::50060168102006f2,7 disk connected configured unknown
c5::50060168102006f2,8 disk connected configured unknown
c5::50060168102006f2,9 disk connected configured unknown
c5::50060168102006f2,10 disk connected configured unknown
c5::50060168102006f2,11 disk connected configured unknown
c5::50060168102006f2,13 disk connected configured unknown
c5::50060168102006f2,14 disk connected configured unknown
-----------
V880 box
# luxadm -e port
/devices/pci@8,600000/SUNW,qlc@2/fp@0,0:devctl CONNECTED
/devices/pci@9,600000/fibre-channel@1/fp@0,0:devctl CONNECTED
/devices/pci@9,600000/fibre-channel@1,1/fp@0,0:devctl CONNECTED
# cfgadm -alo show_SCSI_LUN
Ap_Id Type Receptacle Occupant Condition
c1 fc-private connected configured unknown
c1::21000004cfcd5d4b,0 disk connected configured unknown
c1::21000004cfcd5da7,0 disk connected configured unknown
c1::21000004cfcd5e17,0 disk connected configured unknown
c1::21000004cfcd64f5,0 disk connected configured unknown
c1::21000004cfcdea5b,0 disk connected configured unknown
c1::21000011c6545ac1,0 disk connected configured unknown
c1::508002000018ccf9 ESI connected configured unknown
c3 fc-fabric connected configured unknown
c3::50060160102006f2,0 disk connected configured unknown
c3::50060160102006f2,1 disk connected configured unknown
c3::50060160102006f2,2 disk connected configured unknown
c3::50060160102006f2,3 disk connected configured unknown
c3::50060160102006f2,4 disk connected configured unknown
c3::50060160102006f2,5 disk connected configured unknown
c3::50060160102006f2,37 disk connected configured unknown
c3::50060160102006f2,43 disk connected configured unknown
c3::50060160102006f2,44 disk connected configured unknown
c3::50060160102006f2,45 disk connected configured unknown
c3::500601683020e124,0 disk connected configured unknown
c3::500601683020e124,1 disk connected configured unknown
c3::500601683020e124,3 disk connected configured unknown
c3::50060169102006f2,0 disk connected configured unknown
c3::50060169102006f2,1 disk connected configured unknown
c3::50060169102006f2,2 disk connected configured unknown
c3::50060169102006f2,3 disk connected configured unknown
c3::50060169102006f2,4 disk connected configured unknown
c3::50060169102006f2,5 disk connected configured unknown
c3::50060169102006f2,37 disk connected configured unknown
c3::50060169102006f2,43 disk connected configured unknown
c3::50060169102006f2,44 disk connected configured unknown
c3::50060169102006f2,45 disk connected configured unknown
c4 fc-fabric connected configured unknown
c4::500601603020e124,0 disk connected configured unknown
c4::500601603020e124,1 disk connected configured unknown
c4::500601603020e124,3 disk connected configured unknown
c4::50060161102006f2,0 disk connected configured unknown
c4::50060161102006f2,1 disk connected configured unknown
c4::50060161102006f2,2 disk connected configured unknown
c4::50060161102006f2,3 disk connected configured unknown
c4::50060161102006f2,4 disk connected configured unknown
c4::50060161102006f2,5 disk connected configured unknown
c4::50060161102006f2,37 disk connected configured unknown
c4::50060161102006f2,43 disk connected configured unknown
c4::50060161102006f2,44 disk connected configured unknown
c4::50060161102006f2,45 disk connected configured unknown
c4::50060168102006f2,0 disk connected configured unknown
c4::50060168102006f2,1 disk connected configured unknown
c4::50060168102006f2,2 disk connected configured unknown
c4::50060168102006f2,3 disk connected configured unknown
c4::50060168102006f2,4 disk connected configured unknown
c4::50060168102006f2,5 disk connected configured unknown
c4::50060168102006f2,37 disk connected configured unknown
c4::50060168102006f2,43 disk connected configured unknown
c4::50060168102006f2,44 disk connected configured unknown
c4::50060168102006f2,45 disk connected configured unknown

The issue should therfore more on the way T1 proc is working. I know that I/o is very slow (EMC navisphere analyzer tool and iostat show me 100% busy with max throughput near 40MB/s; service time is between 120 and 160 ms let's imagine) ...
A ultrasparc III comes with 8MB l2 cache and 64K icache and 64K dcache and a T1 comes with a 3MB L2 cache shared by all the hardware threads and 8K icache.

The way Rman is working is ressemble a single threaded application. pstack gives me 11 threads but onlu one is doing processing and others are doing I/O ... I got lot of paging activity too but no swapping !

Yann

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