Large Receive Interrupt Count

chad_small

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Anyone had an issue where their backups were extremely slow and their Interrupts were huge? I've got 400GB DB's taking 40hrs to backup over a 4 port Etherchannel connection. No errors in my AIX errpt and the network guys are telling me they don't think it's them. Any suggestions on what to look at are appreciated.

ETHERNET STATISTICS (en8) :
Device Type: IEEE 802.3ad Link Aggregation
Hardware Address: 00:14:5e:e7:26:41
Elapsed Time: 9 days 19 hours 20 minutes 35 seconds

Transmit Statistics: Receive Statistics:
-------------------- -------------------
Packets: 5470416553 Packets: 24510516113
Bytes: 440661650021 Bytes: 32245892708954
Interrupts: 0 Interrupts: 6027433898
Transmit Errors: 0 Receive Errors: 691
Packets Dropped: 0 Packets Dropped: 0
Bad Packets: 0
Max Packets on S/W Transmit Queue: 298
S/W Transmit Queue Overflow: 0
Current S/W+H/W Transmit Queue Length: 355

Broadcast Packets: 8786 Broadcast Packets: -1346793420
Multicast Packets: 225928 Multicast Packets: 136913
No Carrier Sense: 0 CRC Errors: 0
DMA Underrun: 0 DMA Overrun: 691
Lost CTS Errors: 0 Alignment Errors: 0
Max Collision Errors: 0 No Resource Errors: 0
Late Collision Errors: 0 Receive Collision Errors: 0
Deferred: 141004 Packet Too Short Errors: 0
SQE Test: 0 Packet Too Long Errors: 0
Timeout Errors: 0 Packets Discarded by Adapter: 0
Single Collision Count: 0 Receiver Start Count: 0
Multiple Collision Count: 0
Current HW Transmit Queue Length: 355

General Statistics:
-------------------
No mbuf Errors: 0
Adapter Reset Count: 0
Adapter Data Rate: 1701737521
Driver Flags: Up Broadcast Running
Simplex 64BitSupport ChecksumOffload
PrivateSegment LargeSend DataRateSet
 
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I have seen several performance issues with newer AIX and newer TSM clients for AIX (6.x) lately, especially with TSM server on windows. TCPWINDOWSIZE 512 on server side (looks like it does not matter what is on client side) solved most of them.
 
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