Squid Proxy Dengan Cache Swap > 40GB (Eksperimen) Bag:2

Seperti yang pernah janjikan bahwa akan melaporkan setiap peningkatan 10 GB cache swap, meskipun agak sedikit telat. Yah karena report yang saya tunjukkan disini disaat cache sudah mencapai 23 GB.

Yang saya perhatikan disini adalah disk I/O bottleneck yang dapat dilihat pada indikasi berikut :
Cache Misses : 0.72130 0.60438
Cache Hits : 0.01556 0.01035

Apabila melewati nilai 0.5 , harap dicermati benar-benar. Sempat beberapa kali menembus angka tersebut terutama pada beban puncak ( 150 client) akses bersamaan, yup harus diwaspadai karena cache mencapai 20GB-an sudah terlihat gejala bottleneck meski belum mengkhawatirkan sekali.

Untuk Byte hit sudah jarang mencapai angka 60%, hanya mencapai kisaran 40 - 55%, sementara Disk Hit meningkat tajam di atas 25% terus :) , memang itu tujuannya punya cache swap besar kan ? hehehe

Squid Object Cache: Version 3.0.STABLE6
Start Time: Thu, 09 Oct 2008 07:08:19 GMT
Current Time: Tue, 14 Oct 2008 05:02:53 GMT
Connection information for squid:
Number of clients accessing cache: 91
Number of HTTP requests received: 431026
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: 60.9
Average ICP messages per minute since start: 0.0
Select loop called: 46860394 times, 9.058 ms avg
Cache information for squid:
Hits as % of all requests: 5min: 52.5%, 60min: 67.2%
Hits as % of bytes sent: 5min: 45.1%, 60min: 64.6%
Memory hits as % of hit requests: 5min: 3.6%, 60min: 6.2%
Disk hits as % of hit requests: 5min: 32.1%, 60min: 28.8%
Storage Swap size: 24217026 KB
Storage Swap capacity: 47.3% used, 52.7% free
Storage Mem size: 18428 KB
Storage Mem capacity: 100.0% used, 0.0% free
Mean Object Size: 21.29 KB
Requests given to unlinkd: 0
Median Service Times (seconds) 5 min 60 min:
HTTP Requests (All): 0.03241 0.01235
Cache Misses: 0.49576 0.58309
Cache Hits: 0.01469 0.00865
Near Hits: 0.32154 0.05046
Not-Modified Replies: 0.00286 0.00286
DNS Lookups: 0.00669 0.00573
ICP Queries: 0.00000 0.00000
Resource usage for squid:
UP Time: 424474.566 seconds
CPU Time: 4672.497 seconds
CPU Usage: 1.10%
CPU Usage, 5 minute avg: 3.39%
CPU Usage, 60 minute avg: 1.54%
Process Data Segment Size via sbrk(): 159744 KB
Maximum Resident Size: 162612 KB
Page faults with physical i/o: 0
Memory accounted for:
Total accounted: 109810 KB
memPoolAlloc calls: 119283489
memPoolFree calls: 116838358
File descriptor usage for squid:
Maximum number of file descriptors: 32768
Largest file desc currently in use: 105
Number of file desc currently in use: 55
Files queued for open: 0
Available number of file descriptors: 32713
Reserved number of file descriptors: 100
Store Disk files open: 0
Internal Data Structures:
1138008 StoreEntries
3801 StoreEntries with MemObjects
3799 Hot Object Cache Items
1137653 on-disk objects

Rgds

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