MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 10/13/01 through 10/19/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 62 554 616
Davis 321 21 342
Irvine 160 0 160
Los Angeles 7 218 225
Riverside 12 40 52
San Diego 33 158 191
San Francisco 126 0 126
Santa Barbara 2 93 95
Santa Cruz 15 61 76
LBL 0 105 105
LLL 0 39 39
Los Alamos n/a 0 0
Other - UC 0 43 43
U.S. Forestry 0
Other-Network UC n/a 531 531
_______ ______ _____
738 1,863 2,601
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 47 166 1,168
2-4 a.m. 27 59 7,576
4-6 a.m. 28 98 2,311
6-8 a.m. 73 184 1,216
8-10 a.m. 311 769 7,656
10-12 a.m. 547 1,569 17,986
12-2 p.m. 449 1,161 9,102
2-4 p.m. 495 1,275 10,377
4-6 p.m. 299 927 8,030
6-8 p.m. 161 426 6,478
8-10 p.m. 74 233 2,234
10-12 p.m. 90 238 2,147
__________ __________ __________ _________________
Total: 2,601 7,105 76,281
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 106 1,690 1,796
Davis 847 53 900
Irvine 461 0 461
Los Angeles 12 575 587
Riverside 21 107 128
San Diego 103 652 755
San Francisco 316 0 316
Santa Barbara 5 231 236
Santa Cruz 33 139 172
LBL 0 252 252
LLL 0 117 117
Los Alamos n/a 0 0
Other - UC 1 241 242
U.S. Forestry 0
Other-Network UC n/a 1,143 1,143
_______ ______ _____
1,905 5,200 7,105
Number of FIND commands by database
CC database 7,016
CCT database 89
Total number of FIND commands 7,105
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,748 14,876 16,624
Davis 5,905 303 6,208
Irvine 14,671 0 14,671
Los Angeles 114 4,278 4,392
Riverside 123 712 835
San Diego 799 5,812 6,611
San Francisco 7,089 0 7,089
Santa Barbara 11 2,636 2,647
Santa Cruz 103 1,282 1,385
LBL 0 4,084 4,084
LLL 0 1,652 1,652
Los Alamos n/a 0 0
Other - UC 0 2,728 2,728
U.S. Forestry 0
Other-Network UC n/a 7,355 7,355
_______ ______ _____
30,563 45,718 76,281
Number of Records Displayed by database:
CC database 69,651
CCT database 6,630
Total number of Records Displayed 76,281
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 96.9%
Percent of CCT sessions 3.1%
Percent of searches done in the CC database 98.7%
Percent of searches done in the CCT database 1.3%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.0
Standard deviation in seconds 4.5
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.5
2.0 CC Database Statistics
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Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 833:18
Average number of searches completed per session 2.8
Retrievals per search - median 8.0
Retrievals per search - average 629.4
Retrievals per search - standard deviation 9656.8
Percent of searches completed with 0 results 23.3%
Percent of searches entered that are long 0.3%
Percent of long searches completed
(includes partial results) 95.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 6,474 37.5%
DISPLAY (excluding automatic displays) 4,954 28.7%
HELP 153 0.9%
EXPLAIN 168 1.0%
SET/RESET 1,183 6.8%
SHOW 31 0.2%
ADD ON (AND, OR, AND NOT) 542 3.1%
LOGON or LOGOFF 2,810 16.3%
COMMENT 0 0.0%
SAVE 202 1.2%
USE 3 0.0%
OTHER 755 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 3,065 43.1% 461 15.0% 29 221.5 1125.2
TITLE WORD 2,352 33.1% 714 30.4% 13 909.9 8110.3
EXACT TITLE 150 2.1% 69 46.0% 2 19.1 76.6
JOURNAL 331 4.7% 113 34.1% 318 7642.0 48307.5
EXACT JOURNAL 149 2.1% 56 37.6% 831 3248.3 7030.1
SUBJECT CAT 20 0.3% 1 5.0% 42 45.3 35.3
SUBFILE 5 0.1% 1 20.0% 933 3167.8 5144.5
PUBLICATION TYPE 17 0.2% 4 23.5% 9 998.5 2961.8
LANGUAGE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 160 2.3% 24 15.0% 18 277.8 1102.6
ADDED 11 0.2% 1 9.1% 24 30.2 24.6
PERIODICAL 429 6.0% 60 14.0% 4 23.6 82.2
EXACT PE 110 1.5% 12 10.9% 4 32.2 141.1
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 309 4.3% 103 33.3% 21 982.1 6156.0
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 621 9.6% 164 26.4% 6 146.6 834.9
Single 5,835 90.4% 1,284 22.0% 25 916.4 11868.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.6%
SHORT 73.7%
LONG 4.8%
FIELDS 0.7%
PERIODICALS 12.8%
COMMENTS 0.0%
Other 1.4%
2.1 CCT Database Statistics
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Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 52:11
Average number of searches completed per session 1.1
Retrievals per search - median 52.0
Retrievals per search - average 383.9
Retrievals per search - standard deviation 2058.4
Percent of searches completed with 0 results 27.0%
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 89 22.2%
DISPLAY (excluding automatic displays) 118 29.4%
HELP 38 9.5%
EXPLAIN 10 2.5%
SET/RESET 52 13.0%
SHOW 5 1.2%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 79 19.7%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 10 2.5%
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 55 61.8% 14 25.5% 152 271.9 501.3
EXACT JOURNAL 26 29.2% 10 38.5% 143 153.6 133.5
SUBJECT CAT 1 1.1% 0 0.0% 19,253 19253.0 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 7 7.9% 0 0.0% 7 186.9 471.1
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 89 100% 24 27.0% 145 525.6 2398.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.8%
ISSUES 47.1%
SHORT 12.3%
LONG 25.4%
PERIODICALS 8.7%
COMMENTS 0.0%
Other 0.7%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
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Percent of commands that contained errors 8.1%
Ten most frequent errors:
1. First word of command is invalid 29.4%
2. NS command - no next screen 28.5%
3. FIND command with invalid index name 9.7%
4. Index invalid in current database 4.6%
5. Max. # of ports to a Z39 db are in use 3.7%
6. PS command - no previous screen 2.4%
7. Search term missing from search command 2.1%
8. D ABS command in database w/o abstracts 1.7%
9. DISPLAY command contains invalid word 1.6%
10. NS of SHOW/EXP command-no next screen 1.6%
11. All others 14.6%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 12.4%
2. FIND (CC DB) 12.4%
3. CC INDEXES 12.4%
4. DATABASES 7.9%
5. LOCATE (ARTICLE DBS) 5.6%
6. Unrecognized term 5.1%
7. CC DATABASE 4.5%
8. COMMANDS 3.4%
9. 1219 2.2%
10. DISPLAY 2.2%
11. All others 32.0%
Ten most frequent HELP situations:
1. First word of command is invalid 17.9%
2. Help requested from START CC command 13.3%
3. F/BR with index invalid in current DB 10.0%
4. FIND command retrieves >1 book 6.2%
5. FIND command with invalid index name 6.0%
6. DISPLAY command - middle of >1 screen 5.1%
7. Help requested from SET DB command 4.9%
8. DISPLAY command-first of >1 screen 4.3%
9. FIND command with zero results 3.0%
10. Add-on without index name after verb 2.7%
11. All others 26.6%
Ten most frequent SHOW requests:
1. HISTORY 44.4%
2. TIME 19.4%
3. SEARCH 8.3%
4. SYSTEM NEWS 5.6%
5. CC SETTINGS 5.6%
6. CC GLOSSARY 5.6%
7. LIBRARY NEWS 2.8%
8. CC NEWS 2.8%
9. SC LIST (CC DBS) 2.8%
10. DATABASES 2.8%
11. All others 0.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)