Vijay Adik vadik@us - IBM
Vijay Adik vadik@us - IBM
Vijay Adik vadik@us - IBM
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50<br />
<strong>IBM</strong> Advanced Technical Support - Americas<br />
Other I/O Stack Tuning Options (PBUFS)<br />
� When vmstat –v shows increasing “pending disk I/Os blocked with<br />
no pbuf” values<br />
lvmo:<br />
� max_vg_pbuf_count (lvmo) = maximum number of pbufs that may be<br />
used for the VG.<br />
� pv_pbuf_count (lvmo) = the # of pbufs that are added when a PV is<br />
added to the VG.<br />
ioo:<br />
� pv_min_pbuf = The minimum # of pbufs per PV used by LVM<br />
© 2009 <strong>IBM</strong> Corporation<br />
April 17, 2009
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