Changing the queue depth for QLogic, Emulex, and Brocade HBAs
Verify which HBA module is currently loaded by entering one of these commands on the service console:
For QLogic:
# esxcli system module list | grep qla
For ESXi 5.5 QLogic native drivers:
# esxcli system module list | grep qln
For Emulex:
# esxcli system module list | grep lpfc
For Brocade:
# esxcli system module list | grep bfa
Run one of these commands:
Note: The examples show the QLogic qla2xxx and Emulex lpfc820 modules. Use the appropriate module based on the outcome of the previous step.
For QLogic:
# esxcli system module parameters set -p ql2xmaxqdepth=64 -m qla2xxx
For ESXi 5.5 QLogic native drivers:
# esxcli system module parameters set -p ql2xmaxqdepth=64 -m qlnativefc
For Emulex:
# esxcli system module parameters set -p lpfc0_lun_queue_depth=64 -m lpfc820
For ESXi 5.5 Emulex native drivers:
# esxcli system module parameters set -p lpfc0_lun_queue_depth=64 -m lpfc
For Brocade:
# esxcli system module parameters set -p bfa_lun_queue_depth=64 -m bfa
Notes:
In these commands, both ql2xmaxqdepth and lpfc0 use the lowercase letter L, "l", and not the numeric digit 1.
In this case, the HBAs represented by ql2x and lpfc0 have their LUN queue depths set to 64.
If all Emulex cards on the host must be updated, apply the global parameter, lpfc_lun_queue_depth instead.
Reboot your host.
Run this command to confirm that your changes have been applied:
# esxcli system module parameters list -m driver
Where driver is your QLogic, Emulex, or Brocade adapter driver module, such as lpfc820, qla2xxx, or bfa.
The output appears similar to:
Name Type Value Description
-------------------------- ---- ----- --------------------------------------------------
.....
ql2xmaxqdepth int 64 Maximum queue depth to report for target devices.
How to increase the maximum queue depth per Logical Unit Number
https://kb.netapp.com/index?page=content&id=1011356&pmv=print&impressions=false