Add regexp caching to reduce load

[pstop.git] / performance_schema / file_summary_by_instance / file_summary_by_instance.go

diff --git a/performance_schema/file_summary_by_instance/file_summary_by_instance.go b/performance_schema/file_summary_by_instance/file_summary_by_instance.go
index 10ef5f4..737caa8 100644 (file)
--- a/performance_schema/file_summary_by_instance/file_summary_by_instance.go
+++ b/performance_schema/file_summary_by_instance/file_summary_by_instance.go
@@ -6,6 +6,7 @@ package file_summary_by_instance
 
 import (
        "database/sql"
+       "fmt"
        "time"
 
        "github.com/sjmudd/pstop/lib"
@@ -139,7 +140,8 @@ func (t File_summary_by_instance) EmptyRowContent() string {
 }
 
 func (t File_summary_by_instance) Description() string {
-       return "File I/O by filename (file_summary_by_instance)"
+       count := t.count_rows()
+       return fmt.Sprintf("File I/O by filename (file_summary_by_instance) %4d row(s)    ", count)
 }
 
 // create a new structure and include various variable values:
@@ -152,3 +154,13 @@ func NewFileSummaryByInstance(global_variables map[string]string) *File_summary_
 
        return n
 }
+
+func (t File_summary_by_instance) count_rows() int {
+       var count int
+       for row := range t.results {
+               if t.results[row].SUM_TIMER_WAIT > 0 {
+                       count++
+               }
+       }
+       return count
+}