Is there a deadlock or slow query problem in session_start?

Is there a deadlock or slow query problem in session_start? in Online php projects, 1 is in my. set log-slow-queries =/slow in cnf. the log2 log file name is slow. in the log3 log file, the message & nbsp; 23:30:37 is displayed. 7 Is there a deadlock or slow query problem with session_start? online?
Php project,

1. set log-slow-queries =/slow. log in my. cnf.
2. the log file name is slow. log.
3. this section is always prompted in the log file.

23:30:37. 771241 pid 30406 (pool default)
Script_filename =/home/wwwroot/nanchang/web/secondHouse/lend_list.php
[0x00007fff67ee6740] session_start ()
/Home/wwwroot/nanchang/web/include/ini_second.php: 2
[0x00007fff67ee7b70] ++ dump failed

Let me help you think about the problem and how to solve it,

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... I have little knowledge about it. wait for a senior student to come to class.
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I have made some speculation in your other post. please refer to it.
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Of course, session_write_close () will be solved. Remember that when session_start () is used up, session_write_close () will be used to close the session immediately; otherwise, a deadlock will occur.