What is QLogic execution throttle and how does it relate to queue depth?

Solution Unverified - Updated -

Issue

  • SAN is overloaded by I/O and need to adjust queue depth and execution throttle
Aug 17 01:14:13 host kernel: qla2xxx [0000:06:00.0]-3840:0: QUEUE FULL detected.
Aug 17 01:14:13 host kernel: qla2xxx [0000:06:00.0]-3822:0: FCP command status: 0x15-0x828 (0x28) nexus=0:1:372 portid=01b7c0 oxid=0x100 cdb=2a0005782d2000001000 len=0x2000 rsp_info=0x0 resid=0x2000 fw_resid=0x2000 sp=ffff885d990b2800 cp=ffff885d698f57c0.
Aug 17 01:14:13 host kernel: qla2xxx [0000:06:00.0]-3840:0: QUEUE FULL detected.
Aug 17 01:14:13 host kernel: qla2xxx [0000:06:00.0]-3822:0: FCP command status: 0x15-0x828 (0x28) nexus=0:1:352 portid=01b7c0 oxid=0x102 cdb=2a0009653fe000001000 len=0x2000 rsp_info=0x0 resid=0x2000 fw_resid=0x2000 sp=ffff885d68e2b440 cp=ffff885da69f0ac0.

Environment

  • Red Hat Enterprise Linux
  • QLogic HBA / qla2xxx driver

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