Sponsored Content
Full Discussion: UBC cache vs. Metadata cache
Top Forums UNIX for Advanced & Expert Users UBC cache vs. Metadata cache Post 20287 by killerserv on Wednesday 24th of April 2002 03:37:13 AM
Old 04-24-2002
MetaData Cache displays the number of hits and misses in the Metadata cache.Hits are satisfied from the cache, which is in physical memory. Misses are satisfied by loading the appropriate blocks from disk into the cache. AdvFS volumes make no contribution to these numbers.

UBC Cache displays the number of hits and misses in the UBC. Hits are satisfied from the UBC , which is in physical memory. Misses are satisfied by loading the appropriate blocks from disk into the UBC. Prior to this version of " vmubc " only the UBC data
cache was counted.

This is the diffrences between MetaData cache and UBC Cache. Im not sure if both chache hits can be found in HP-UX, might someone assist you in this.
 

9 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

vm and buffer cache

i have a serious doubht about the assignment of memory in hp-ux system . i read from somewhere that the page allocation in hp-ux is not unified unlike compaq . i wanted to know in hp-ux kernel ,once the pages are assigned for the univarsal buffer cache... (2 Replies)
Discussion started by: vish_shan
2 Replies

2. HP-UX

Buffer Cache

What is the "Buffer Cache" used for? (1 Reply)
Discussion started by: ALTRUNVRSOFLN
1 Replies

3. Solaris

ARP Cache

Dear all, We are testing two of our servers for mq series connectivity. The scenario is, when one machine is shutting down it's services there are some scripts that do a dns update, which removes the ip address and relates it to the ip address of the other node on our dns server, and the update... (7 Replies)
Discussion started by: earlysame55
7 Replies

4. Linux

Linux cache

Hi all I am trying to understand the kernel memory management and require assistance in this regard. Kernel first creates the cache memory to perform any subsequent allocation to processes. I could not figure out how it is accomplished. Do kernel directly allocates any hardware cache or allocates... (0 Replies)
Discussion started by: joshighanshyam
0 Replies

5. Solaris

Solaris File Cache

I started a previous thread : https://www.unix.com/sun-solaris/76721-coredumps-swap-part-solaris-mem-consumption.html But my fault as there is no xml feed for this forum i lost track and thread got closed. So in the mean time i went through some docs and here are my queries : 1. mdb -k... (2 Replies)
Discussion started by: rajwinder
2 Replies

6. Solaris

Page cache too large

I have a solaris10 box running a java application on it. Whenever the java app is used heavily, the amount of free memory decreases fairly rapidly. I believe I have eliminated the running applications from the culprit list. In the process I have found that the page cache is consuming about 20G... (4 Replies)
Discussion started by: timothy.edwards
4 Replies

7. Linux

getting info on Cache Size, Data Cache etc..

Hi all I saw in Microsoft web site www.SysInternals.com a tool called CoreInfo from able to print out on screen the size of the Data and Instruction caches of your processor, the Locigal to Physical Processor mapping, the number of the CPU sockets. etc.. Do you know if in Linux is available a... (2 Replies)
Discussion started by: manustone
2 Replies

8. Linux

File cache /Page cache Linux

Hi All, could any one point out any open source test-suites for "File cache" testing and as well as performance test suites for the same. Currently my system is up with Linux/ext4. Regards Manish (0 Replies)
Discussion started by: hmanish
0 Replies

9. Linux

Linux cache

Hi, We are working on OEL5.7 (Oracle Linux) OS. We have a server with 64GB RAM. When we issue free -m command which shows the used, available and cached space. Most of the space is shown in cached section, where as we are not really doing much activity on the server. It's like cached is... (5 Replies)
Discussion started by: shrshah64
5 Replies
cachefsstat(1M) 														   cachefsstat(1M)

NAME
cachefsstat - Cache File System statistics SYNOPSIS
path... ] DESCRIPTION
The command displays statistical information about the cache filesystem mounted on path. The statistical information includes cache hits and misses, consistency checking, and modification operations. If path is not specified, all mounted cache filesystems are used. can also be used to reinitialize this information (see description for the option). The statistical information has the following format: <cache hit rate> <consistency checks> <modifies> where each of the above is defined as: cache hit rate The percentage of cache hits over the total number of attempts followed by the actual numbers of hits and misses. consistency checks The number of consistency checks performed followed by the number that passed and the number that failed. modifies The number of modify operations, including writes, creates, and so on. Options recognizes the following option: Zero (reinitialize) statistics. Execute before executing again to gather statistics on the cache performance. This option can only be used by the supe- ruser. The statistics printed reflect those just before the statistics are reinitialized. RETURN VALUE
returns the following values: Success. non-zero An error occurred. EXAMPLES
AUTHOR
was developed by Sun Microsystems, Inc. SEE ALSO
cfsadmin(1M). cachefsstat(1M)
All times are GMT -4. The time now is 09:15 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy