[squid-users] FATAL: Too many queued redirector requests

Hi, I don't know how to handle memory for squid. Squid automatically
breaks down itself and restarts:

In my squid.conf I set:

url_rewrite_children 120 startup=30 idle=100 concurrency=0
max_filedesc 7168
cache_swap_low 60
cache_swap_high 80

I notice that just one pending requests queued:

2011/06/09 11:00:17| WARNING: All redirector processes are busy.
2011/06/09 11:00:17| WARNING: 1 pending requests queued

and follow is more details of cache.log:

2011/06/09 11:00:16| WARNING: Cannot run
'/opt/squid-3.1.10/urlrewriter_new.pl' process.
2011/06/09 11:00:16| ipcCreate: fork: (12) Cannot allocate memory
2011/06/09 11:00:16| WARNING: Cannot run
'/opt/squid-3.1.10/urlrewriter_new.pl' process.
2011/06/09 11:00:16| ipcCreate: fork: (12) Cannot allocate memory
2011/06/09 11:00:16| WARNING: Cannot run
'/opt/squid-3.1.10/urlrewriter_new.pl' process.
2011/06/09 11:00:16| ipcCreate: fork: (12) Cannot allocate memory
2011/06/09 11:00:16| WARNING: Cannot run
'/opt/squid-3.1.10/urlrewriter_new.pl' process.
2011/06/09 11:00:17| WARNING: All redirector processes are busy.
2011/06/09 11:00:17| WARNING: 1 pending requests queued
2011/06/09 11:00:17| storeDirWriteCleanLogs: Starting...
2011/06/09 11:00:17| WARNING: Closing open FD� 177
2011/06/09 11:00:17|�� Finished.� Wrote 16367 entries.
2011/06/09 11:00:17|�� Took 0.01 seconds (1308941.14 entries/sec).
FATAL: Too many queued redirector requests
Squid Cache (Version 3.1.10): Terminated abnormally.
<----------------------------------� CRASH ***
CPU Usage: 6631.678 seconds = 4839.266 user + 1792.412 sys
Maximum Resident Size: 0 KB
Page faults with physical i/o: 3299
Memory usage for squid via mallinfo():
������� total space in arena:� -1160028 KB
������� Ordinary blocks:������ -1289701 KB� 53024 blks
������� Small blocks:�������������� 0 KB����� 1 blks
������� Holding blocks:�������� 15976 KB����� 6 blks
������� Free Small blocks:��������� 0 KB
������� Free Ordinary blocks:� 129672 KB
������� Total in use:��������� -1273725 KB 110%
������� Total free:����������� 129672 KB -10%
2011/06/09 11:00:26| Starting Squid Cache version 3.1.10 for
x86_64-unknown-linux-gnu...
2011/06/09 11:00:26| Process ID 31241
2011/06/09 11:00:26| With 7168 file descriptors available
Received on Thu Jun 09 2011 - 08:16:26 MDT