关于Freeing项目的Mysql锁定：为什么？

Question

链接到完整图片：http://i.stack.imgur.com/VODiJ.png

的my.cnf：

[mysqld]
plugin-load=ha_xtradb.so

datadir=/w/mysql
innodb_buffer_pool_size = 100G
innodb_log_file_size = 2G
innodb_file_per_table=1
max_connections = 500

我正在使用MariaDB。一小时之后，Mysql会“锁定”（例如查看基本的插入查询），以便运行我的脚本。

它可能是什么？

---

自由：

SYSTEM MEMORY INFORMATION:
mem_wire:       17899466752 (  17070MB) [ 11%] Wired: disabled for paging out
mem_active:  +  12577095680 (  11994MB) [  8%] Active: recently referenced
mem_inactive:+    148381696 (    141MB) [  0%] Inactive: recently not referenced
mem_cache:   +       151552 (      0MB) [  0%] Cached: almost avail. for allocation
mem_free:    + 119319916544 ( 113792MB) [ 79%] Free: fully available for allocation
mem_gap_vm:  +       839680 (      0MB) [  0%] Memory gap: UNKNOWN
-------------- ------------ ----------- ------
mem_all:     = 149945851904 ( 142999MB) [100%] Total real memory managed
mem_gap_sys: +   4594712576 (   4381MB)        Memory gap: Kernel?!
-------------- ------------ -----------
mem_phys:    = 154540564480 ( 147381MB)        Total real memory available
mem_gap_hw:  +  17258127360 (  16458MB)        Memory gap: Segment Mappings?!
-------------- ------------ -----------
mem_hw:      = 171798691840 ( 163840MB)        Total real memory installed

SYSTEM MEMORY SUMMARY:
mem_used:       52330242048 (  49906MB) [ 30%] Logically used memory
mem_avail:   + 119468449792 ( 113933MB) [ 69%] Logically available memory
-------------- ------------ ----------- ------
mem_total:   = 171798691840 ( 163840MB) [100%] Logically total memory

正常运行时间：

 2:32PM  up 6 days, 21:09, 2 users, load averages: 0.64, 0.44, 0.32 (loads during the script grows up to 20 (24 HT cores, 12 physical cores)

uname -a

 FreeBSD  8.2-RELEASE-p3 FreeBSD 8.2-RELEASE-p3 #0: Tue Sep 27 18:45:57 UTC 2011     root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  amd64