Hi,
I have a Squid 2.5STABLE5 running on Linux (RHL 8.0, 1.5 GB RAM) using 28 GB disk space and serving 5,000 users. It has been in use for more a year now.
In the last few days, the squid process has grown drastically in size. Usally, squid has around 400 MB in memory. At some point, it starts allocating more and more RAM. I've seen it using 1.2 GB RAM and aggressive paging.
The proxy has 1.8 million objects on disk and 150 MB for the metadata should be enough.
In cachemgr.cgi / Memory Utilization I can see mem_node growing bigger and bigger when process size increases.
What's mem_node's purpose? I've seen mem_node allocating 800 MB when the squid process had 1.2 GB.
Config: cache_mem 100 MB maximum_object_size 250 MB cache_dir diskd /var/spool/squid-standard 28000 16 256
At first, I tried to limit memory pooling:
memory_pools_limit 64 MB
-> no difference
The I tried to switch off pooling:
memory_pools off
-> no difference
I've seen segmentation violations in cache.log:
FATAL: Received Segment Violation...dying.
2004/07/07 10:15:14| storeDirWriteCleanLogs: Starting...
2004/07/07 10:15:31| Starting Squid Cache version 2.5.STABLE5 for i686-pc-linux-gnu...
2004/07/07 10:15:31| Process ID 17870
2004/07/07 10:15:31| With 8192 file descriptors available
FATAL: Received Segment Violation...dying.
2004/07/07 10:54:46| storeDirWriteCleanLogs: Starting...
2004/07/07 10:54:46| WARNING: Closing open FD 30
2004/07/07 10:54:46| 65536 entries written so far.
2004/07/07 10:54:46| 131072 entries written so far.
2004/07/07 10:54:46| 196608 entries written so far.
2004/07/07 10:54:46| 262144 entries written so far.
2004/07/07 10:54:47| 327680 entries written so far.
2004/07/07 10:54:47| 393216 entries written so far.
2004/07/07 10:54:48| 458752 entries written so far.
2004/07/07 10:54:48| 524288 entries written so far.
2004/07/07 10:54:48| 589824 entries written so far.
2004/07/07 10:54:48| 655360 entries written so far.
2004/07/07 10:54:48| 720896 entries written so far.
2004/07/07 10:54:49| 786432 entries written so far.
2004/07/07 10:54:49| 851968 entries written so far.
2004/07/07 10:54:49| 917504 entries written so far.
2004/07/07 10:54:49| 983040 entries written so far.
2004/07/07 10:54:49| 1048576 entries written so far.
2004/07/07 10:54:53| Starting Squid Cache version 2.5.STABLE5 for i686-pc-linux-gnu...
FATAL: Received Segment Violation...dying. 2004/07/07 12:37:52| storeDirWriteCleanLogs: Starting... 2004/07/07 12:37:52| WARNING: Closing open FD 30 2004/07/07 12:37:52| 65536 entries written so far.
