Hi,
Browsing the FAQ, and having read:
http://www.squid-cache.org/Doc/FAQ/FAQ-11.html#ss11.17
I did the page faults/connections calculation and got fairly high ratio's,
implying that squid may be paging too much. Looking at memory usage with
cachemgr and top, it looks to me like I should be ok for memory, would
anyone care to help clarify this for me?
Sorry about the size of the message, I'm including all of cachemgr's info
in case there is anything else there I should know about. For reference,
the two caches are in a sibling relationship and serve the whole
university community. Our Internet link is currently 64K, increasing to
128K soon (gasp!... :-)
Thanks,
Simon
--
8<-------------------------------------------------
Cache0: P100, 128MB, RH Linux 6.0/2.2.12, 2.1GB IDE, Squid 2.2S5
top:
Mem: 128432K av, 125284K used, 3148K free, 12504K shrd, 68464K buff
Swap: 133016K av, 2932K used, 130084K free 10672K cached
PID USER PRI NI SIZE RSS SHARE STAT LIB %CPU %MEM TIME COMMAND
436 nobody 10 0 30908 28M 1856 R 0 29.0 22.5 85:37 squid
cachemgr:
Connection information for squid:
Number of clients accessing cache: 136
Number of HTTP requests received: 21981
Number of ICP messages received: 17002
Number of ICP messages sent: 17002
Number of queued ICP replies: 0
Request failure ratio: 0.00%
HTTP requests per minute: 20.0
ICP messages per minute: 30.9
Select loop called: 405592 times, 162.538 ms avg
Cache information for squid:
Request Hit Ratios: 5min: 35.2%, 60min: 27.8%
Byte Hit Ratios: 5min: 8.1%, 60min: 14.7%
Storage Swap size: 1303737 KB
Storage Mem size: 8176 KB
Storage LRU Expiration Age: 30.57 days
Mean Object Size: 8.12 KB
Requests given to unlinkd: 7236
Median Service Times (seconds) 5 min 60 min:
HTTP Requests (All): 3.11263 2.37608
Cache Misses: 7.38455 3.66001
Cache Hits: 0.15888 0.24524
Near Hits: 2.50793 2.64709
Not-Modified Replies: 0.27332 0.24524
DNS Lookups: 0.45394 0.20377
ICP Queries: 0.00000 0.00000
Resource usage for squid:
UP Time: 65923.912 seconds
CPU Time: 5164.140 seconds
CPU Usage: 7.83%
CPU Usage, 5 minute avg: 17.22%
CPU Usage, 60 minute avg: 14.61%
Maximum Resident Size: 0 KB
Page faults with physical i/o: 9988
Memory usage for squid via mallinfo():
Total space in arena: 29246 KB
Ordinary blocks: 28759 KB 706 blks
Small blocks: 0 KB 0 blks
Holding blocks: 692 KB 1 blks
Free Small blocks: 0 KB
Free Ordinary blocks: 486 KB
Total in use: 29451 KB 101%
Total free: 486 KB 2%
Memory accounted for:
Total accounted: 21783 KB
File descriptor usage for squid:
Maximum number of file descriptors: 4096
Largest file desc currently in use: 35
Number of file desc currently in use: 29
Files queued for open: 0
Available number of file descriptors: 4067
Reserved number of file descriptors: 100
Store Disk files open: 1
Internal Data Structures:
160677 StoreEntries
1554 StoreEntries with MemObjects
1549 Hot Object Cache Items
160637 Filemap bits set
160636 on-disk objects
page faults/number of connections:
9988/21981 = 0.454
8<-------------------------------------------------
Cache1: P100, 128MB, RH Linux 6.0/2.2.12, 6.4GB IDE, Squid 2.2S5
top:
Mem: 128432K av, 125292K used, 3140K free, 7328K shrd, 10648K buff
Swap: 128484K av, 2952K used, 125532K free 8636K cached
PID USER PRI NI SIZE RSS SHARE STAT LIB %CPU %MEM TIME COMMAND
429 nobody 16 0 95912 92M 924 S 0 4.0 73.4 19:59 squid
cachemgr:
Connection information for squid:
Number of clients accessing cache: 177
Number of HTTP requests received: 39879
Number of ICP messages received: 20420
Number of ICP messages sent: 21600
Number of queued ICP replies: 4
Request failure ratio: 0.00%
HTTP requests per minute: 30.5
ICP messages per minute: 32.2
Select loop called: 684962 times, 114.419 ms avg
Cache information for squid:
Request Hit Ratios: 5min: 23.9%, 60min: 30.9%
Byte Hit Ratios: 5min: 26.9%, 60min: 31.2%
Storage Swap size: 4911418 KB
Storage Mem size: 28660 KB
Storage LRU Expiration Age: 98.78 days
Mean Object Size: 7.91 KB
Requests given to unlinkd: 13411
Median Service Times (seconds) 5 min 60 min:
HTTP Requests (All): 2.64709 2.25116
Cache Misses: 2.94900 3.46762
Cache Hits: 0.08265 0.04776
Near Hits: 2.94900 2.37608
Not-Modified Replies: 0.02069 0.04277
DNS Lookups: 0.07968 0.08334
ICP Queries: 0.00000 0.00000
Resource usage for squid:
UP Time: 78372.478 seconds
CPU Time: 1201.710 seconds
CPU Usage: 1.53%
CPU Usage, 5 minute avg: 0.21%
CPU Usage, 60 minute avg: 1.02%
Maximum Resident Size: 0 KB
Page faults with physical i/o: 26623
Memory usage for squid via mallinfo():
Total space in arena: 94258 KB
Ordinary blocks: 93985 KB 3466 blks
Small blocks: 0 KB 0 blks
Holding blocks: 860 KB 2 blks
Free Small blocks: 0 KB
Free Ordinary blocks: 272 KB
Total in use: 94845 KB 101%
Total free: 272 KB 0%
Memory accounted for:
Total accounted: 78318 KB
File descriptor usage for squid:
Maximum number of file descriptors: 4096
Largest file desc currently in use: 37
Number of file desc currently in use: 27
Files queued for open: 0
Available number of file descriptors: 4069
Reserved number of file descriptors: 100
Store Disk files open: 1
Internal Data Structures:
629061 StoreEntries
5807 StoreEntries with MemObjects
5802 Hot Object Cache Items
620566 Filemap bits set
620574 on-disk objects
page faults/number of connections:
26623/39879 = 0.668
8<-------------------------------------------------
--
Simon Greaves voice: (+679) 212114
Computer Centre fax: (+679) 304089
The University of the South Pacific email: Simon.Greaves@usp.ac.fj
Suva, Fiji
Received on Thu Jan 06 2000 - 14:52:06 MST
This archive was generated by hypermail pre-2.1.9 : Tue Dec 09 2003 - 16:50:15 MST