Hello,
I was wondering if you guys could help me determine what the problem
might be with trac/mysql. We were going smooth up until 110K tickets
in trac. What happens now is that after a while (3h) mysql starts
using 100% of the cpu, while all the other requests are waiting. I
need to determine which query is that? Who's running it, etc? or
whether it is my mysql settings?


Ideas?

my.mysql:

key_buffer              = 1600M
max_allowed_packet      = 16M
thread_stack            = 128K
query_cache_limit       = 1M
query_cache_size        = 64M

 show status like 'qc%';
+-------------------------+----------+
| Variable_name           | Value    |
+-------------------------+----------+
| Qcache_free_blocks      | 62       |
| Qcache_free_memory      | 66876024 |
| Qcache_hits             | 45233    |
| Qcache_inserts          | 1606     |
| Qcache_lowmem_prunes    | 0        |
| Qcache_not_cached       | 670      |
| Qcache_queries_in_cache | 159      |
| Qcache_total_blocks     | 408      |
+-------------------------+----------+
8 rows in set (0.00 sec)

show variables like 'query%';
+------------------------------+----------+
| Variable_name                | Value    |
+------------------------------+----------+
| query_alloc_block_size       | 8192     |
| query_cache_limit            | 1048576  |
| query_cache_min_res_unit     | 4096     |
| query_cache_size             | 67108864 |
| query_cache_type             | ON       |
| query_cache_wlock_invalidate | OFF      |
| query_prealloc_size          | 8192     |
+------------------------------+----------+
7 rows in set (0.00 sec)

What can I do to trouble shoot this problem?

Thanks,
Lucas

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