Hello,
We are having trouble with cachemgr performance. Do you know why
squidclient could delay 10 seconds on mgr:xxx queries ?
I have looked about any timeout, or network error, or something, but I
did not find nothing
See info and storedir outputs :
11:16:24 O: HTTP/1.1 200 OK
11:16:24 O: Server: squid/3.5.1
11:16:24 O: Mime-Version: 1.0
11:16:24 O: Date: Fri, 09 Dec 2016 10:16:24 GMT
11:16:24 O: Content-Type: text/plain
11:16:24 O: Expires: Fri, 09 Dec 2016 10:16:24 GMT
11:16:24 O: Last-Modified: Fri, 09 Dec 2016 10:16:24 GMT
11:16:24 O: Connection: close
11:16:24 O: < ===================== STALE 10 seconds ====
11:16:34 O: Squid Object Cache: Version 3.5.1
11:16:34 E: Shared connection to proxyweb02 closed.
11:16:34 O: Build Info:
11:16:34 O: Service Name: squid
11:16:34 O: Start Time: Fri, 09 Dec 2016 08:30:20 GMT
11:16:34 O: Current Time: Fri, 09 Dec 2016 10:16:24 GMT
11:16:34 O: Connection information for squid:
11:16:34 O: Number of clients accessing cache: 1630
11:16:34 O: Number of HTTP requests received: 541924
11:16:34 O: Number of ICP messages received: 0
11:16:34 O: Number of ICP messages sent: 0
11:16:34 O: Number of queued ICP replies: 0
11:16:34 O: Number of HTCP messages received: 0
11:16:34 O: Number of HTCP messages sent: 0
11:16:34 O: Request failure ratio: 0.00
11:16:34 O: Average HTTP requests per minute since start: 5109.1
11:16:34 O: Average ICP messages per minute since start: 0.0
11:16:34 O: Select loop called: 13075819 times, 1.967 ms avg
11:16:34 O: Cache information for squid:
11:16:34 O: Hits as % of all requests: 5min: 7.7%, 60min: 6.6%
11:16:34 O: Hits as % of bytes sent: 5min: 6.7%, 60min: 9.2%
11:16:34 O: Memory hits as % of hit requests: 5min: 0.0%, 60min: 0.0%
11:16:34 O: Disk hits as % of hit requests: 5min: 73.9%, 60min: 74.1%
11:16:34 O: Storage Swap size: 11325052 KB
11:16:34 O: Storage Swap capacity: 90.0% used, 10.0% free
11:16:34 O: Storage Mem size: 736 KB
11:16:34 O: Storage Mem capacity: 0.1% used, 99.9% free
11:16:34 O: Mean Object Size: 29.44 KB
11:16:34 O: Requests given to unlinkd: 0
11:16:34 O: Median Service Times (seconds) 5 min 60 min:
11:16:34 O: HTTP Requests (All): 0.03698 0.03437
11:16:34 O: Cache Misses: 0.04456 0.04870
11:16:34 O: Cache Hits: 0.00091 0.00179
11:16:34 O: Near Hits: 0.00683 0.00707
11:16:34 O: Not-Modified Replies: 0.00000 0.00065
11:16:34 O: DNS Lookups: 0.00126 0.00126
11:16:34 O: ICP Queries: 0.00000 0.00000
11:16:34 O: Resource usage for squid:
11:16:34 O: UP Time: 6364.214 seconds
11:16:34 O: CPU Time: 2481.987 seconds
11:16:34 O: CPU Usage: 39.00%
11:16:34 O: CPU Usage, 5 minute avg: 37.19%
11:16:34 O: CPU Usage, 60 minute avg: 38.61%
11:16:34 O: Maximum Resident Size: 2347456 KB
11:16:34 O: Page faults with physical i/o: 0
11:16:34 O: Memory accounted for:
11:16:34 O: Total accounted: 199928 KB
11:16:34 O: memPoolAlloc calls: 295256640
11:16:34 O: memPoolFree calls: 301578438
11:16:34 O: File descriptor usage for squid:
11:16:34 O: Maximum number of file descriptors: 98304
11:16:34 O: Largest file desc currently in use: 2566
11:16:34 O: Number of file desc currently in use: 4030
11:16:34 O: Files queued for open: 0
11:16:34 O: Available number of file descriptors: 94274
11:16:34 O: Reserved number of file descriptors: 300
11:16:34 O: Store Disk files open: 3
11:16:34 O: Internal Data Structures:
11:16:34 O: 384892 StoreEntries
11:16:34 O: 208 StoreEntries with MemObjects
11:16:34 O: 14 Hot Object Cache Items
11:16:34 O: 384687 on-disk objects
11:16:34 O:
11:16:34 O: real 0m10.019s
11:16:34 O: user 0m0.006s
11:16:34 O: sys 0m0.006s
11:14:53 O: HTTP/1.1 200 OK
11:14:53 O: Server: squid/3.5.1
11:14:53 O: Mime-Version: 1.0
11:14:53 O: Date: Fri, 09 Dec 2016 10:14:53 GMT
11:14:53 O: Content-Type: text/plain
11:14:53 O: Expires: Fri, 09 Dec 2016 10:14:53 GMT
11:14:53 O: Last-Modified: Fri, 09 Dec 2016 10:14:53 GMT
11:14:53 O: Connection: close
11:14:53 O:
11:14:53 O: by kid1 {
11:14:53 O: Store Directory Statistics:
11:14:53 O: Store Entries : 126418
11:14:53 O: Maximum Swap Size : 4194304 KB
11:14:53 O: Current Store Swap Size: 3774836.00 KB
11:14:53 O: Current Capacity : 90.00% used, 10.00% free
11:14:53 O:
11:14:53 O:
11:14:53 O: Shared Memory Cache
11:14:53 O: Maximum Size: 1048576 KB
11:14:53 O: Current Size: 736.00 KB 0.07%
11:14:53 O: Maximum entries: 32768
11:14:53 O: Current entries: 14 0.04%
11:14:53 O: Maximum slots: 32768
11:14:53 O: Used slots: 23 0.07%
11:14:53 O:
11:14:53 O: Store Directory #0 (aufs): /var/log/squid/cache/cache1
11:14:53 O: FS Block Size 4096 Bytes
11:14:53 O: First level subdirectories: 128
11:14:53 O: Second level subdirectories: 128
11:14:53 O: Maximum Size: 4194304 KB
11:14:53 O: Current Size: 3774836.00 KB
11:14:53 O: Percent Used: 90.00%
11:14:53 O: Filemap bits in use: 126340 of 262144 (48%)
11:14:53 O: Filesystem Space in use: 15704112/22008352 KB (71%)
11:14:53 O: Filesystem Inodes in use: 575168/29360128 (2%)
11:14:53 O: Flags: SELECTED
11:14:53 O: Removal policy: lru
11:14:53 O: LRU reference age: 2.00 days
11:14:53 O: } by kid1
11:14:53 O:
11:14:53 O: by kid2 {
11:14:53 O: Store Directory Statistics:
11:14:53 O: Store Entries : 131817
11:14:53 O: Maximum Swap Size : 4194304 KB
11:14:53 O: Current Store Swap Size: 3774848.00 KB
11:14:53 O: Current Capacity : 90.00% used, 10.00% free
11:14:53 O:
11:14:53 O:
11:14:53 O: Shared Memory Cache
11:14:53 O: Maximum Size: 1048576 KB
11:14:53 O: Current Size: 736.00 KB 0.07%
11:14:53 O: Maximum entries: 32768
11:14:53 O: Current entries: 14 0.04%
11:14:53 O: Maximum slots: 32768
11:14:53 O: Used slots: 23 0.07%
11:14:53 O:
11:14:53 O: Store Directory #0 (aufs): /var/log/squid/cache/cache2
11:14:53 O: FS Block Size 4096 Bytes
11:14:53 O: First level subdirectories: 128
11:14:53 O: Second level subdirectories: 128
11:14:53 O: Maximum Size: 4194304 KB
11:14:53 O: Current Size: 3774848.00 KB
11:14:53 O: Percent Used: 90.00%
11:14:53 O: Filemap bits in use: 131752 of 262144 (50%)
11:14:53 O: Filesystem Space in use: 15704112/22008352 KB (71%)
11:14:53 O: Filesystem Inodes in use: 575168/29360128 (2%)
11:14:53 O: Flags: SELECTED
11:14:53 O: Removal policy: lru
11:14:53 O: LRU reference age: 2.14 days
11:14:53 O: } by kid2
11:14:53 O:
11:14:53 O: by kid3 {
11:14:53 O: Store Directory Statistics:
11:14:53 O: Store Entries : 126609
11:14:53 O: Maximum Swap Size : 4194304 KB
11:14:53 O: Current Store Swap Size: 3774872.00 KB
11:14:53 O: Current Capacity : 90.00% used, 10.00% free
11:14:53 O:
11:14:53 O:
11:14:53 O: Shared Memory Cache
11:14:53 O: Maximum Size: 1048576 KB
11:14:53 O: Current Size: 736.00 KB 0.07%
11:14:53 O: Maximum entries: 32768
11:14:53 O: Current entries: 14 0.04%
11:14:53 O: Maximum slots: 32768
11:14:53 O: Used slots: 23 0.07%
11:14:53 O:
11:14:53 O: Store Directory #0 (aufs): /var/log/squid/cache/cache3
11:14:53 O: FS Block Size 4096 Bytes
11:14:53 O: First level subdirectories: 128
11:14:53 O: Second level subdirectories: 128
11:14:53 O: Maximum Size: 4194304 KB
11:14:53 O: Current Size: 3774872.00 KB
11:14:53 O: Percent Used: 90.00%
11:14:53 O: Filemap bits in use: 126552 of 262144 (48%)
11:14:53 O: Filesystem Space in use: 15704112/22008352 KB (71%)
11:14:53 O: Filesystem Inodes in use: 575168/29360128 (2%)
11:14:53 O: Flags: SELECTED
11:14:53 O: Removal policy: lru
11:14:53 O: LRU reference age: 3.91 days
11:14:53 O: } by kid3
11:15:03 O: < ===================== STALE 10 seconds ====
11:15:03 O: real 0m10.017s
11:15:03 O: user 0m0.006s
11:15:03 O: sys 0m0.006s
We have 3 balanced squid proxy, at another squid I have seen the same
behaviour but with 20 seconds delay. When we restarted that squid,
mgr:info / mgr:storedir become inmediate.
Thank you very much
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