Re: [squid-users] Objects Release from Cache Earlier Than Expected

Hi -

Here's some additional info I noticed from the store.log.

1224524455.351
SWAPOUT 00 0003A6CB 7377CBD1A7584A5D7C7FD06B5B827595 200 1224524431
1224522501 -1 video/jpeg 1337100/1337100 GET http://ftp.mydomain.com/myserver/websites/data/MyVideoFile1020130441180.vid
1224544851.517
RELEASE 00 0003A6CB CD5B96F66CC94483D586D7E67A76A94C 200 1224524431
1224522501 -1 video/jpeg 1337100/-279 GET http://ftp.mydomain.com/myserver/websites/data/MyVideoFile1020130441180.vid
1224544862.563
SWAPOUT 00 0003CA26 7377CBD1A7584A5D7C7FD06B5B827595 200 1224544840
1224522501 -1 video/jpeg 1337100/1337100 GET http://ftp.mydomain.com/myserver/websites/data/MyVideoFile1020130441180.vid

Trace breaks down as follows.
1) File was first pre-fetched by wget program.
2) File was released by cache.
3) File was re-fetch when a user tried to access it.

The
thing that stuck out is that in the RELEASE line of the log, the
real-length is a negative number (-279). What does this mean exactly?

----- Original Message ----
From: BUI18 <lbui18_at_yahoo.com>
To: squid-users_at_squid-cache.org
Sent: Monday, October 20, 2008 4:02:52 PM
Subject: [squid-users] Objects Release from Cache Earlier Than Expected

Hi -

I have been trying to track down an issue with Squid 2.6 STABLE18 and why users were getting TCP_REFRESH_MISS instead of TCP_REFRESH_HIT on files that were recently cached. We first noticed that users were getting misses when we expected them to receive hits.

I have set the min and max age to be 5 and 7 days respectively. When I look in the store.log file, I do see objects which were known to have been cached today (base on time/date stamp in the file name), yet they have status code of RELEASE.

The cache_dir (1 TB) on this system is only 25% full. The low watermark is set at 95% with high at 97%.

Does any one have any ideas on why Squid would appear to purge the object earlier than expected?

Thanks in advance.

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Received on Mon Oct 20 2008 - 23:43:28 MDT