Hi Everybody,
4 months before now I sent a question to this list. Thank you all for answering,
I managed to compile the kernel and set the "TCQ Enabled By Default" to
"Enabled". Now I have a new /proc/scsi/adaptec/0 file, which seems to be
better than before. But unfortunately my special need is not solved yet.
I am using Postgres, and when I rebuild the database (with pg_dump) there are
many small transactions (about 10 thousand ones). On an IDE winchester the
rebuild process takes 3 minutes, on my SCSI one it takes 10 or more. Why?
OK, I solved this problem putting the INSERT statements into one giant
transaction, the process time is now 5 seconds. But I would like to know:
what are you thinking about the new configuration? Is it correct?
Please answer my mail to my private address, because I'm not a member of
the list. Thank you in advance.
Zoltan
# Commented lines are the old ones (without setting "TCQ Enabled By Default"
# to "Enabled" in the kernel).
Adaptec AIC7xxx driver version: 5.1.20/3.2.4
Compile Options:
TCQ Enabled By Default : Enabled
# TCQ Enabled By Default : Disabled
AIC7XXX_PROC_STATS : Enabled
AIC7XXX_RESET_DELAY : 5
Adapter Configuration:
SCSI Adapter: Adaptec AIC-7850 SCSI host adapter
Narrow Controller
PCI MMAPed I/O Base: 0xfecff000
Adapter SEEPROM Config: SEEPROM found and used.
Adaptec SCSI BIOS: Enabled
IRQ: 11
SCBs: Active 2, Max Active 8,
# SCBs: Active 0, Max Active 1,
Allocated 15, HW 3, Page 255
Interrupts: 27655
# Interrupts: 123904
BIOS Control Word: 0x10b6
Adapter Control Word: 0x005c
Extended Translation: Enabled
Disconnect Enable Flags: 0x00ff
Tag Queue Enable Flags: 0x0001
#Tag Queue Enable Flags: 0x0000
Ordered Queue Tag Flags: 0x0001
#Ordered Queue Tag Flags: 0x0000
Default Tag Queue Depth: 8
Tagged Queue By Device array for aic7xxx host instance 0:
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}
# {255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255}
Actual queue depth per device for aic7xxx host instance 0:
{8,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
# {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
Statistics:
(scsi0:0:0:0)
Device using Narrow/Sync transfers at 10.0 MByte/sec, offset 15
Transinfo settings: current(25/15/0/0), goal(25/15/0/0), user(25/15/0/0)
Total transfers 27605 (2550 reads and 25055 writes)
# Total transfers 123854 (8124 reads and 115730 writes)
< 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+
Reads: 578 106 812 606 197 125 126 0
# Reads: 9 0 4570 1124 1171 468 782 0
Writes: 652 119 12510 11369 368 23 14 0
# Writes: 0 0 60220 52295 1342 242 1631 0
----------------------------------------------------------------------------
KOV\'ACS Zolt\'an
Assistant teacher at Bolyai Institute in mathematics, Szeged
http://www.math.u-szeged.hu/~kovzol
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