On 29.09.14 13:39, Eliezer Croitoru wrote:
Hey Steve,
Can you share the basic cache manager requests statistics and the up
time for the service?
(mgr:info)
This is with 8 workers and was restarted this morning, about 6 hours
ago. As you can see, it's using about 5GB at the moment - as mentioned,
there is no caching enabled for this configuration so there doesn't seem
much reason for it to grow so large.
Squid Object Cache: Version 3.4.6
Build Info:
Start Time: Tue, 30 Sep 2014 08:33:01 GMT
Current Time: Tue, 30 Sep 2014 14:14:28 GMT
Connection information for squid:
Number of clients accessing cache: 2545
Number of HTTP requests received: 926815
Number of ICP messages received: 0
Number of ICP messages sent: 0
Number of queued ICP replies: 0
Number of HTCP messages received: 0
Number of HTCP messages sent: 0
Request failure ratio: 0.00
Average HTTP requests per minute since start: 2714.3
Average ICP messages per minute since start: 0.0
Select loop called: 33693001 times, 5.219 ms avg
Cache information for squid:
Hits as % of all requests: 5min: 0.0%, 60min: 0.0%
Hits as % of bytes sent: 5min: 3.5%, 60min: 4.4%
Memory hits as % of hit requests: 5min: 0.0%, 60min: 0.0%
Disk hits as % of hit requests: 5min: 0.0%, 60min: 0.0%
Storage Swap size: 0 KB
Storage Swap capacity: 0.0% used, 0.0% free
Storage Mem size: 2168 KB
Storage Mem capacity: 0.0% used, 0.0% free
Mean Object Size: 0.00 KB
Requests given to unlinkd: 0
Median Service Times (seconds) 5 min 60 min:
HTTP Requests (All): 0.06557 0.06988
Cache Misses: 0.06629 0.07171
Cache Hits: 0.00000 0.00000
Near Hits: 0.00000 0.00000
Not-Modified Replies: 0.00000 0.00000
DNS Lookups: 0.00012 0.00000
ICP Queries: 0.00000 0.00000
Resource usage for squid:
UP Time: 20487.255 seconds
CPU Time: 3177.711 seconds
CPU Usage: 15.51%
CPU Usage, 5 minute avg: 11.44%
CPU Usage, 60 minute avg: 12.40%
Maximum Resident Size: 19930960 KB
Page faults with physical i/o: 6
Memory usage for squid via mallinfo():
Total space in arena: 5014812 KB
Ordinary blocks: 5004965 KB 2620 blks
Small blocks: 0 KB 0 blks
Holding blocks: 82080 KB 48 blks
Free Small blocks: 0 KB
Free Ordinary blocks: 9847 KB
Total in use: 9847 KB 0%
Total free: 9847 KB 0%
Total size: 5096892 KB
Memory accounted for:
Total accounted: 447132 KB 9%
memPool accounted: 447132 KB 9%
memPool unaccounted: 4649760 KB 91%
memPoolAlloc calls: 528851610
memPoolFree calls: 531832922
File descriptor usage for squid:
Maximum number of file descriptors: 131072
Largest file desc currently in use: 209
Number of file desc currently in use: 754
Files queued for open: 0
Available number of file descriptors: 130318
Reserved number of file descriptors: 800
Store Disk files open: 0
Internal Data Structures:
510 StoreEntries
510 StoreEntries with MemObjects
408 Hot Object Cache Items
0 on-disk objects
For comparison, almost all of the http (but none of the https) requests
that go through the proxy above are then sent through a second proxy
which does do some caching, but no fancy stuff like ICAP or ssl bumping
- the caching proxy has been running for 18 days and has a far smaller
process size (again, 8 workers):
Squid Object Cache: Version 3.4.6
Build Info:
Start Time: Fri, 12 Sep 2014 08:48:50 GMT
Current Time: Tue, 30 Sep 2014 14:18:35 GMT
Connection information for squid:
Number of clients accessing cache: 1
Number of HTTP requests received: 19496669
Number of ICP messages received: 0
Number of ICP messages sent: 0
Number of queued ICP replies: 0
Number of HTCP messages received: 0
Number of HTCP messages sent: 0
Request failure ratio: 0.00
Average HTTP requests per minute since start: 742.7
Average ICP messages per minute since start: 0.0
Select loop called: 763795228 times, 2.062 ms avg
Cache information for squid:
Hits as % of all requests: 5min: 13.1%, 60min: 12.8%
Hits as % of bytes sent: 5min: 7.0%, 60min: 4.7%
Memory hits as % of hit requests: 5min: 0.0%, 60min: 0.0%
Disk hits as % of hit requests: 5min: 16.4%, 60min: 11.9%
Storage Swap size: 3773012 KB
Storage Swap capacity: 90.0% used, 10.0% free
Storage Mem size: 262144 KB
Storage Mem capacity: 100.0% used, 0.0% free
Mean Object Size: 28.55 KB
Requests given to unlinkd: 3198063
Median Service Times (seconds) 5 min 60 min:
HTTP Requests (All): 0.02899 0.03241
Cache Misses: 0.03066 0.03241
Cache Hits: 0.00405 0.00091
Near Hits: 0.03066 0.03427
Not-Modified Replies: 0.00000 0.00000
DNS Lookups: 0.00000 0.00000
ICP Queries: 0.00000 0.00000
Resource usage for squid:
UP Time: 1574985.354 seconds
CPU Time: 32733.608 seconds
CPU Usage: 2.08%
CPU Usage, 5 minute avg: 3.80%
CPU Usage, 60 minute avg: 3.54%
Maximum Resident Size: 1025200 KB
Page faults with physical i/o: 289968
Memory usage for squid via mallinfo():
Total space in arena: 49616 KB
Ordinary blocks: 38418 KB 15268 blks
Small blocks: 0 KB 0 blks
Holding blocks: 10520 KB 7 blks
Free Small blocks: 0 KB
Free Ordinary blocks: 11198 KB
Total in use: 11198 KB 19%
Total free: 11198 KB 19%
Total size: 60136 KB
Memory accounted for:
Total accounted: 27128 KB 45%
memPool accounted: 27128 KB 45%
memPool unaccounted: 33008 KB 55%
memPoolAlloc calls: 5279809700
memPoolFree calls: 5314670336
File descriptor usage for squid:
Maximum number of file descriptors: 16384
Largest file desc currently in use: 67
Number of file desc currently in use: 50
Files queued for open: 0
Available number of file descriptors: 16334
Reserved number of file descriptors: 100
Store Disk files open: 0
Internal Data Structures:
132586 StoreEntries
444 StoreEntries with MemObjects
8192 Hot Object Cache Items
132142 on-disk objects
As a separate note: I'm not sure why the memory footprint of the caching
squid is so low - with cache_mem set to 256MB (100% used, apparently)
and 8 workers I would expect it to be much more. Something else for me
to investigate when I've got time. :)
--
- Steve Hill
Technical Director
Opendium Limited http://www.opendium.com
Direct contacts:
Instant messager: xmpp:steve@xxxxxxxxxxxx
Email: steve@xxxxxxxxxxxx
Phone: sip:steve@xxxxxxxxxxxx
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Email: sales@xxxxxxxxxxxx
Phone: +44-844-9791439 / sip:sales@xxxxxxxxxxxx
Support contacts:
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Phone: +44-844-4844916 / sip:support@xxxxxxxxxxxx
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