MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 12/08/01 through 12/14/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 53 459 512
Davis 341 8 349
Irvine 139 0 139
Los Angeles 3 137 140
Riverside 23 48 71
San Diego 33 176 209
San Francisco 109 0 109
Santa Barbara 2 82 84
Santa Cruz 13 37 50
LBL 0 97 97
LLL 0 37 37
Los Alamos n/a 0 0
Other - UC 2 42 44
U.S. Forestry 0
Other-Network UC n/a 517 517
_______ ______ _____
718 1,640 2,358
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 33 107 632
2-4 a.m. 22 69 7,751
4-6 a.m. 21 50 720
6-8 a.m. 89 224 2,095
8-10 a.m. 274 636 5,034
10-12 a.m. 449 1,089 7,779
12-2 p.m. 369 968 9,082
2-4 p.m. 470 1,159 9,720
4-6 p.m. 343 887 8,290
6-8 p.m. 124 391 2,795
8-10 p.m. 96 233 1,620
10-12 p.m. 68 226 1,217
__________ __________ __________ _________________
Total: 2,358 6,039 56,735
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 207 1,218 1,425
Davis 879 13 892
Irvine 414 0 414
Los Angeles 13 362 375
Riverside 48 134 182
San Diego 110 437 547
San Francisco 290 0 290
Santa Barbara 3 220 223
Santa Cruz 23 87 110
LBL 0 196 196
LLL 0 117 117
Los Alamos n/a 0 0
Other - UC 7 106 113
U.S. Forestry 0
Other-Network UC n/a 1,155 1,155
_______ ______ _____
1,994 4,045 6,039
Number of FIND commands by database
CC database 5,955
CCT database 84
Total number of FIND commands 6,039
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,944 10,584 12,528
Davis 7,398 39 7,437
Irvine 9,824 0 9,824
Los Angeles 36 1,813 1,849
Riverside 156 1,647 1,803
San Diego 707 4,250 4,957
San Francisco 3,319 0 3,319
Santa Barbara 0 2,452 2,452
Santa Cruz 360 1,012 1,372
LBL 0 3,510 3,510
LLL 0 1,167 1,167
Los Alamos n/a 0 0
Other - UC 59 923 982
U.S. Forestry 0
Other-Network UC n/a 5,535 5,535
_______ ______ _____
23,803 32,932 56,735
Number of Records Displayed by database:
CC database 54,106
CCT database 2,629
Total number of Records Displayed 56,735
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 97.5%
Percent of CCT sessions 2.5%
Percent of searches done in the CC database 98.6%
Percent of searches done in the CCT database 1.4%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.3
Standard deviation in seconds 4.5
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.2
Standard deviation in seconds 4.5
2.0 CC Database Statistics
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 985:57
Average number of searches completed per session 2.6
Retrievals per search - median 8.0
Retrievals per search - average 583.0
Retrievals per search - standard deviation 7140.4
Percent of searches completed with 0 results 22.0%
Percent of searches entered that are long 0.6%
Percent of long searches completed
(includes partial results) 69.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 5,316 34.5%
DISPLAY (excluding automatic displays) 4,504 29.2%
HELP 128 0.8%
EXPLAIN 159 1.0%
SET/RESET 1,112 7.2%
SHOW 29 0.2%
ADD ON (AND, OR, AND NOT) 639 4.1%
LOGON or LOGOFF 2,570 16.7%
COMMENT 0 0.0%
SAVE 263 1.7%
USE 8 0.1%
OTHER 675 4.4%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 2,787 47.1% 445 16.0% 29 252.6 2169.6
TITLE WORD 1,782 30.1% 516 29.0% 14 900.5 9719.7
EXACT TITLE 57 1.0% 23 40.3% 1 66.8 229.8
JOURNAL 278 4.7% 113 40.6% 454 7957.7 30703.8
EXACT JOURNAL 109 1.8% 52 47.7% 574 3526.3 8361.2
SUBJECT CAT 34 0.6% 2 5.9% 23 69.4 112.9
SUBFILE 17 0.3% 2 11.8% 54 107.1 122.2
PUBLICATION TYPE 39 0.7% 6 15.4% 7 94.0 272.6
LANGUAGE 14 0.2% 1 7.1% 4 2229.5 7856.5
DATE 133 2.2% 17 12.8% 10 113.5 580.9
ADDED 13 0.2% 2 15.4% 3 3.5 2.3
PERIODICAL 319 5.4% 29 9.1% 5 29.1 81.7
EXACT PE 96 1.6% 12 12.5% 2 14.5 39.7
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 237 4.0% 57 24.0% 18 1425.2 7261.9
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 594 11.2% 151 25.4% 5 318.6 4214.7
Single 4,697 88.8% 969 20.6% 29 879.9 8872.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.9%
SHORT 74.4%
LONG 6.0%
FIELDS 2.3%
PERIODICALS 11.0%
COMMENTS 0.0%
Other 1.5%
2.1 CCT Database Statistics
____________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 20:11
Average number of searches completed per session 1.4
Retrievals per search - median 14.0
Retrievals per search - average 339.6
Retrievals per search - standard deviation 1643.9
Percent of searches completed with 0 results 29.8%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 84 24.9%
DISPLAY (excluding automatic displays) 123 36.4%
HELP 14 4.1%
EXPLAIN 8 2.4%
SET/RESET 29 8.6%
SHOW 4 1.2%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 62 18.3%
COMMENT 0 0.0%
SAVE 1 0.3%
USE 0 0.0%
OTHER 13 3.8%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
JOURNAL 51 60.7% 16 31.4% 151 363.9 872.1
EXACT JOURNAL 11 13.1% 6 54.5% 102 134.8 145.8
SUBJECT CAT 1 1.2% 0 0.0% 14,246 14246.0 0.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 0 0.0% 0 0.0% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 21 25.0% 3 14.3% 4 48.5 139.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 84 100% 25 29.8% 84 483.6 1948.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
ISSUES 45.6%
SHORT 16.9%
LONG 11.0%
PERIODICALS 20.6%
COMMENTS 0.0%
Other 2.9%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 7.7%
Ten most frequent errors:
1. First word of command is invalid 28.6%
2. NS command - no next screen 27.8%
3. FIND command with invalid index name 10.3%
4. Index invalid in current database 4.2%
5. Search term missing from search command 2.6%
6. Valid command at an inappropriate time 2.5%
7. DISPLAY command contains invalid word 2.4%
8. Max. # of ports to a Z39 db are in use 2.4%
9. D ABS command in database w/o abstracts 2.2%
10. PS command - no previous screen 2.0%
11. All others 14.9%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 15.6%
2. FIND (CC DB) 13.2%
3. CC INDEXES 12.6%
4. LOCATE (ARTICLE DBS) 8.4%
5. CC DATABASE 5.4%
6. DATABASES 4.8%
7. COMMANDS 4.8%
8. ADD-ON SEARCH 3.6%
9. Unrecognized term 3.0%
10. 5337 3.0%
11. All others 25.7%
Ten most frequent HELP situations:
1. Help requested from START CC command 15.9%
2. First word of command is invalid 9.4%
3. Help requested from SET DB command 8.1%
4. FIND command with invalid index name 7.8%
5. DISPLAY command-first of >1 screen 6.1%
6. F/BR with index invalid in current DB 5.5%
7. FIND command retrieves >1 book 4.9%
8. FIND command with zero results 4.2%
9. DISPLAY command - middle of >1 screen 3.2%
10. Add-on without index name after verb 2.9%
11. All others 32.0%
Ten most frequent SHOW requests:
1. HISTORY 42.4%
2. SEARCH 15.2%
3. TIME 9.1%
4. CC SETTINGS 6.1%
5. CC LOADING STATISTICS 6.1%
6. MAIL STATUS 6.1%
7. SYSTEM NEWS 3.0%
8. SYSTEM5 NEWS 3.0%
9. CC GLOSSARY 3.0%
10. CC NEWS 3.0%
11. All others 3.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)