ats can't save large object in memory
-------------------------------------
Key: TS-951
URL: https://issues.apache.org/jira/browse/TS-951
Project: Traffic Server
Issue Type: Bug
Affects Versions: 3.1.0
Environment: centos 6.0 x86_64 ats 3.1.0 build from svn
Reporter: bettydramit
1. The record.config is follow
# Cache
#
##############################################################################
CONFIG proxy.config.cache.permit.pinning INT 0
# default the ram cache size to AUTO_SIZE (-1) based on cache size
# (approximately 1 MB of RAM cache per GB of disk cache)
# alternatively, set to a fixed value such as 20971520 (20MB)
CONFIG proxy.config.cache.ram_cache.size INT -1
#CONFIG proxy.config.cache.ram_cache_cutoff INT 4194304
CONFIG proxy.config.cache.ram_cache_cutoff INT 314572800
# Replacement algorithm
# 0 : Clocked Least Frequently Used by Size (CLFUS) w/optional compression
# 1 : LRU w/o optional compression - trivially simple
CONFIG proxy.config.cache.ram_cache.algorithm INT 0
# Compress the content of the ram cache:
# 0 : no compression
# 1 : fastlz (extremely fast, relatively low compression)
# 2 : libz (moderate speed, reasonable compression)
# 3 : liblzma (very slow, high compression)
# NOTE: compression runs on task threads. To use more cores for
# compression, increase proxy.config.task_threads.
CONFIG proxy.config.cache.ram_cache.compress INT 0
# The maximum number of alternates that are allowed for any given URL.
# It is not possible to strictly enforce this if the variable
# 'proxy.config.cache.vary_on_user_agent' is set to 1.
# The default value for 'proxy.config.cache.vary_on_user_agent' is 0.
# (0 disables the maximum number of alts check)
CONFIG proxy.config.cache.limits.http.max_alts INT 5
I get the file from ats proxy.
wget -S -O /dev/null -e http_proxy=127.0.0.1
http://www.test.com/CentOS-6.0-x86_64-netinstall.iso
--2011-09-14 10:31:24-- http://www.test.com/CentOS-6.0-x86_64-netinstall.iso
Connecting to 127.0.0.1:80... connected.
Proxy request sent, awaiting response...
HTTP/1.0 200 OK
Date: Wed, 14 Sep 2011 02:24:13 GMT
Server: ATS/3.0.1
Last-Modified: Wed, 14 Sep 2011 02:23:35 GMT
ETag: "201480-d300000-4acdd7285324b"
Accept-Ranges: bytes
Content-Length: 221249536
Content-Type: application/octet-stream
Age: 431
Length: 221249536 (211M) [application/octet-stream]
Saving to: "/dev/null"
100%[====================================================================================>]
221,249,536 90.6M/s in 2.3s
2011-09-14 10:31:26 (90.6 MB/s) - "/dev/null" saved [221249536/221249536]
I request the file more than 3,at the same time i use the dstat to monitor the
disk.the follwing info is
----total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system--
usr sys idl wai hiq siq| read writ| recv send| in out | int csw
0 0 100 0 0 0| 0 0 | 120B 452B| 0 0 | 493 1759
0 0 100 0 0 0| 0 0 | 180B 826B| 0 0 | 542 1825
0 0 99 1 0 0| 0 208k| 120B 346B| 0 0 | 665 1897
2 2 95 0 0 0| 0 0 | 496B 542B| 0 0 |1817 2300
0 0 100 0 0 0| 0 0 | 316B 542B| 0 0 | 874 1987
0 0 100 0 0 0| 0 0 | 316B 542B| 0 0 | 742 2005
0 0 100 0 0 0| 0 0 | 602B 596B| 0 0 | 625 1927
0 0 99 1 0 0| 0 624k|1372B 1626B| 0 0 | 928 2106
0 0 100 0 0 0| 0 160k|3204B 2389B| 0 0 | 950 2049
0 1 99 0 0 0| 0 0 | 890B 1052B| 0 0 | 716 1935
2 0 98 0 0 0| 0 0 | 512B 792B| 0 0 | 839 1943
12 3 80 6 0 0| 163M 0 | 772B 3787B| 0 0 |2652 4345
7 3 82 8 0 0| 155M 336k| 646B 1680B| 0 0 |2375 6258
0 1 96 3 0 0| 54M 672k| 632B 1218B| 0 0 |1067 3438
0 0 99 0 0 0| 0 0 | 286B 702B| 0 0 | 715 1947
0 0 100 0 0 0| 0 0 | 236B 346B| 0 0 | 668 1992
Why the object hit from disk ???
is it bug??
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