OpenLDAP建立日志文件 loglevel该怎么设置

3台ldap服务器中有一台ldap从服务器老是出error，但是怎么都找不到原因。

能不能通过建立openldap的日志文件，通过这个日志文件找到出error的原因？

loglevel该怎么设置才能满足我的需要？

man slapd.conf 的loglevel参数
oglevel [...]

          Specify the level at which debugging statements and operation statistics should be syslogged (currently logged to  the
          syslogd(8)  LOG_LOCAL4  facility).   They  must  be considered subsystems rather than increasingly verbose log levels.
          Some messages with higher priority are logged regardless of the  configured  loglevel  as  soon  as  some  logging  is
          configured, otherwise anything is logged at all.  Log levels are additive, and available levels are:
                  1      (0x1 trace) trace function calls
                  2      (0x2 packets) debug packet handling
                  4      (0x4 args) heavy trace debugging (function args)
                  8      (0x8 conns) connection management
                  16     (0x10 BER) print out packets sent and received
                  32     (0x20 filter) search filter processing
                  64     (0x40 config) configuration file processing
                  128    (0x80 ACL) access control list processing
                  256    (0x100 stats) stats log connections/operations/results
                  512    (0x200 stats2) stats log entries sent
                  1024   (0x400 shell) print communication with shell backends
                  2048   (0x800 parse) entry parsing
                  4096   (0x1000 cache) caching (unused)
                  8192   (0x2000 index) data indexing (unused)
                  16384  (0x4000 sync) LDAPSync replication
                  32768  (0x8000 none) only messages that get logged whatever log level is set
          The  desired log level can be input as a single integer that combines the (ORed) desired levels, both in decimal or in
          hexadecimal notation, as a list of integers (that are ORed internally), or as a list  of  the  names  that  are  shown
          between brackets, such that

              loglevel 129
              loglevel 0x81
              loglevel 128 1
              loglevel 0x80 0x1
              loglevel acl trace

          are  equivalent.   The  keyword any can be used as a shortcut to enable logging at all levels (equivalent to -1).  The
          keyword none, or the equivalent integer representation, causes those  messages  that  are  logged  regardless  of  the
          configured  loglevel to be logged.  In fact, if loglevel is set to 0, no logging occurs, so at least the none level is
          required to have high priority messages logged.  The loglevel defaults to stats.