Some performance improvements.

lib/import/otrs2.rb

@@ -89,12 +89,18 @@ module Import::OTRS2
     data['Key'] = Setting.get('import_otrs_endpoint_key')
     log 'POST: ' + url
     log 'PARAMS: ' + data.inspect
+    open_timeout = 10
+    read_timeout = 120
+    if data.empty?
+      open_timeout = 6
+      read_timeout = 20
+    end
     response = UserAgent.post(
       url,
       data,
       {
-        open_timeout: 6,
+        open_timeout: open_timeout,
-        read_timeout: 60,
+        read_timeout: read_timeout,
         user: Setting.get('import_otrs_user'),
         password: Setting.get('import_otrs_password'),
       },
@@ -343,7 +349,7 @@ module Import::OTRS2
 
     # create customers
     count = 0
-    steps = 30
+    steps = 50
     run   = true
     while run
         count += steps
@@ -360,6 +366,8 @@ module Import::OTRS2
     thread_count              = 8
     threads                   = {}
     count                     = 0
+    memory_clear_after_loops  = 10
+    memory_clear_loop_counter = 0
     locks                     = { User: {} }
     (1..thread_count).each {|thread|
       threads[thread] = Thread.new {
@@ -369,6 +377,11 @@ module Import::OTRS2
         run = true
         steps = 20
         while run
+          memory_clear_loop_counter++
+          if memory_clear_loop_counter == memory_clear_after_loops
+            GC.start
+            memory_clear_loop_counter = 0
+          end
           count += steps
           log "loading... thread# #{thread} ..."
           offset = count - steps
@@ -512,6 +525,8 @@ module Import::OTRS2
 
     result.each {|record|
 
+      ActiveRecord::Base.transaction do
+
         # cleanup values
         _cleanup(record)
 
@@ -790,6 +805,7 @@ module Import::OTRS2
             )
           end
         }
+      end
     }
   end