Operating System - HP-UX
1753855
Members
7338
Online
108808
Solutions
Forums
Categories
Company
Local Language
back
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Discussions
back
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Blogs
Information
Community
Resources
Community Language
Language
Forums
Blogs
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
06-13-2001 12:13 AM
06-13-2001 12:13 AM
lvmkd
Hi there,
May I know what does lvmkd does in a HP-UX 11.0 environment. Recently, my SAP on Oracle 8.0 is slowing down to a crawl. From some basic analysis, I found that one of the logical device is showing high response time (in terms of 1,000 ms) even though the lv is stripe 64K across 4 devices. I'm looking for all posibilities to improved the situation and one of them is decrasing the lvmkd nice value, but I'm not certain if it will help at all.
Thanks, I welcome any advice.
Lai
SIngapore Power Ltd.
May I know what does lvmkd does in a HP-UX 11.0 environment. Recently, my SAP on Oracle 8.0 is slowing down to a crawl. From some basic analysis, I found that one of the logical device is showing high response time (in terms of 1,000 ms) even though the lv is stripe 64K across 4 devices. I'm looking for all posibilities to improved the situation and one of them is decrasing the lvmkd nice value, but I'm not certain if it will help at all.
Thanks, I welcome any advice.
Lai
SIngapore Power Ltd.
If it doesn't work, We'll make it work. If it works, We'll make it work better.
1 REPLY 1
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
06-13-2001 12:19 AM
06-13-2001 12:19 AM
Re: lvmkd
Hi
The lvmkd's are daemon processes that watch a queue. When a job
arrives in the queue an lvmkd launches the job as a process,
which is now managed by the kernel and is subject to the normal
priority and CPU constraints as other processes.
The following are the routines that call lvmkd:
* NAME: lv_check_pf_pvs
*
* FUNCTION:
* Look at all disks belonging to any volume group, if the device is
readable.
* assume it has come back to life and restart any I/O waiting for it.
* NAME: lv_startpv
*
* FUNCTION: Initiate all I/O pending for a given physical volume.
* Must not be called from within an interrupt
* service routine (biodone) to prevent recursion
* and reentry of the physical disk driver.
* NAME: lv_reschedule
*
* FUNCTION:
* Schedule pended logical operations. This function is called
when ever physical buffers have been released and there are
logical buffers waiting for physical buffers. This will
schedule as many pended logical buffers as possible given the
number of available physical buffers.
*
* NAME: lv_begin
*
* FUNCTION:
* Begin physical I/O operations.
* NAME: lv_initiate
* FUNCTION: Initiate all ready logical requests for a logical
volume.
*
* lv_resync_pfpv:
*
* For every PV in every VG, check for the LVM_PVNEEDSYNC flag
* and resync those PVs.
The lvmkd's are daemon processes that watch a queue. When a job
arrives in the queue an lvmkd launches the job as a process,
which is now managed by the kernel and is subject to the normal
priority and CPU constraints as other processes.
The following are the routines that call lvmkd:
* NAME: lv_check_pf_pvs
*
* FUNCTION:
* Look at all disks belonging to any volume group, if the device is
readable.
* assume it has come back to life and restart any I/O waiting for it.
* NAME: lv_startpv
*
* FUNCTION: Initiate all I/O pending for a given physical volume.
* Must not be called from within an interrupt
* service routine (biodone) to prevent recursion
* and reentry of the physical disk driver.
* NAME: lv_reschedule
*
* FUNCTION:
* Schedule pended logical operations. This function is called
when ever physical buffers have been released and there are
logical buffers waiting for physical buffers. This will
schedule as many pended logical buffers as possible given the
number of available physical buffers.
*
* NAME: lv_begin
*
* FUNCTION:
* Begin physical I/O operations.
* NAME: lv_initiate
* FUNCTION: Initiate all ready logical requests for a logical
volume.
*
* lv_resync_pfpv:
*
* For every PV in every VG, check for the LVM_PVNEEDSYNC flag
* and resync those PVs.
love computers
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
News and Events
Support
© Copyright 2024 Hewlett Packard Enterprise Development LP