MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 05/11/02 through 05/17/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 44 463 507
Davis 190 8 198
Irvine 108 0 108
Los Angeles 0 136 136
Riverside 11 24 35
San Diego 18 150 168
San Francisco 89 0 89
Santa Barbara 1 71 72
Santa Cruz 12 34 46
LBL 0 77 77
LLL 0 34 34
Los Alamos n/a 0 0
Other - UC 0 79 79
U.S. Forestry 0
Other-Network UC n/a 133 133
_______ ______ _____
473 1,209 1,682
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 25 99 1,092
2-4 a.m. 14 102 637
4-6 a.m. 23 85 922
6-8 a.m. 57 142 1,980
8-10 a.m. 195 681 6,159
10-12 a.m. 306 1,154 7,547
12-2 p.m. 300 884 15,559
2-4 p.m. 298 830 6,448
4-6 p.m. 228 703 5,772
6-8 p.m. 93 349 2,503
8-10 p.m. 79 208 2,002
10-12 p.m. 64 214 2,015
__________ __________ __________ _________________
Total: 1,682 5,451 52,636
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 75 1,455 1,530
Davis 572 14 586
Irvine 463 0 463
Los Angeles 0 436 436
Riverside 36 108 144
San Diego 95 374 469
San Francisco 562 0 562
Santa Barbara 1 180 181
Santa Cruz 20 93 113
LBL 0 240 240
LLL 0 78 78
Los Alamos n/a 0 0
Other - UC 1 237 238
U.S. Forestry 0
Other-Network UC n/a 411 411
_______ ______ _____
1,825 3,626 5,451
Number of FIND commands by database
CC database 5,339
CCT database 112
Total number of FIND commands 5,451
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 608 15,026 15,634
Davis 12,976 118 13,094
Irvine 2,557 0 2,557
Los Angeles 0 3,626 3,626
Riverside 157 771 928
San Diego 384 2,365 2,749
San Francisco 2,218 0 2,218
Santa Barbara 14 1,446 1,460
Santa Cruz 392 670 1,062
LBL 0 2,434 2,434
LLL 0 623 623
Los Alamos n/a 0 0
Other - UC 1 2,582 2,583
U.S. Forestry 0
Other-Network UC n/a 3,668 3,668
_______ ______ _____
19,307 33,329 52,636
Number of Records Displayed by database:
CC database 49,098
CCT database 3,538
Total number of Records Displayed 52,636
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 95.8%
Percent of CCT sessions 4.2%
Percent of searches done in the CC database 97.9%
Percent of searches done in the CCT database 2.1%
1.5 Response time
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Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.1
Standard deviation in seconds 4.4
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.4
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) 259:17
Average number of searches completed per session 3.3
Retrievals per search - median 10.0
Retrievals per search - average 601.5
Retrievals per search - standard deviation 5518.5
Percent of searches completed with 0 results 20.3%
Percent of searches entered that are long 0.3%
Percent of long searches completed
(includes partial results) 52.9%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 4,856 37.4%
DISPLAY (excluding automatic displays) 3,715 28.6%
HELP 107 0.8%
EXPLAIN 104 0.8%
SET/RESET 526 4.0%
SHOW 24 0.2%
ADD ON (AND, OR, AND NOT) 483 3.7%
LOGON or LOGOFF 2,274 17.5%
COMMENT 0 0.0%
SAVE 326 2.5%
USE 1 0.0%
OTHER 582 4.5%
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:
PERSONAL AUTHOR 2,207 40.7% 309 14.0% 30 211.3 976.9
TITLE WORD 1,753 32.3% 493 28.1% 13 890.2 5309.1
EXACT TITLE 70 1.3% 28 40.0% 3 118.5 675.2
JOURNAL 273 5.0% 73 26.7% 881 2877.1 5617.7
EXACT JOURNAL 125 2.3% 24 19.2% 3,893 5613.2 8023.2
SUBJECT CAT 30 0.6% 2 6.7% 16 59.3 110.7
SUBFILE 21 0.4% 0 0.0% 25 750.4 3012.8
PUBLICATION TYPE 26 0.5% 11 42.3% 6 41.8 74.8
LANGUAGE 40 0.7% 4 10.0% 4 135.9 778.8
DATE 126 2.3% 15 11.9% 6 58.9 180.9
ADDED 56 1.0% 22 39.3% 4 6.2 7.1
PERIODICAL 366 6.7% 35 9.6% 4 21.7 60.4
EXACT PE 74 1.4% 5 6.8% 3 12.4 34.3
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 258 4.8% 106 41.1% 16 3263.3 26515.8
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 528 10.9% 135 25.6% 6 131.3 909.6
Single 4,310 89.1% 845 19.6% 26 894.7 6807.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
SHORT 74.8%
LONG 5.7%
FIELDS 1.7%
PERIODICALS 13.4%
COMMENTS 0.0%
Other 1.5%
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) 34:26
Average number of searches completed per session 1.6
Retrievals per search - median 52.5
Retrievals per search - average 428.8
Retrievals per search - standard deviation 2273.7
Percent of searches completed with 0 results 25.9%
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 112 22.9%
DISPLAY (excluding automatic displays) 200 41.0%
HELP 33 6.8%
EXPLAIN 15 3.1%
SET/RESET 52 10.7%
SHOW 3 0.6%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 61 12.5%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 12 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 88 78.6% 25 28.4% 88 412.2 2055.2
EXACT JOURNAL 13 11.6% 3 23.1% 142 420.2 698.8
SUBJECT CAT 1 0.9% 0 0.0% 17,768 17768.0 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 10 8.9% 1 10.0% 1 9.8 23.8
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 112 100% 29 25.9% 86 578.6 2628.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 21.2%
ISSUES 29.5%
SHORT 33.2%
LONG 11.5%
PERIODICALS 4.1%
COMMENTS 0.0%
Other 0.5%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 7.9%
Ten most frequent errors:
1. NS command - no next screen 32.6%
2. First word of command is invalid 26.6%
3. FIND command with invalid index name 11.2%
4. Index invalid in current database 3.7%
5. DISPLAY command - no FIND results 3.6%
6. DISPLAY command contains invalid word 2.6%
7. PS command - no previous screen 2.4%
8. Search term missing from search command 2.2%
9. F SUB CAT search with invalid SC 1.7%
10. D ABS command in database w/o abstracts 1.3%
11. All others 12.1%
Ten most frequent EXPLAIN requests:
1. FIND (CC DB) 15.1%
2. CC INDEXES 14.3%
3. CC GUIDE 10.9%
4. COMMANDS 9.2%
5. Unrecognized term 7.6%
6. CCT INDEXES 5.0%
7. FIND (CCT DB) 4.2%
8. DATABASES 3.4%
9. DISPLAY 3.4%
10. LOCATE (ARTICLE DBS) 2.5%
11. All others 24.4%
Ten most frequent HELP situations:
1. First word of command is invalid 18.1%
2. Help requested from START CC command 14.3%
3. FIND command with invalid index name 10.8%
4. F/BR with index invalid in current DB 8.9%
5. Help requested from SET DB command 6.6%
6. FIND command with zero results 5.0%
7. DISPLAY command - middle of >1 screen 4.6%
8. FIND command retrieves >1 book 3.9%
9. DISPLAY command - last of >1 screen 3.5%
10. NS of SHOW/EXP command-no next screen 3.1%
11. All others 21.2%
Ten most frequent SHOW requests:
1. HISTORY 50.0%
2. CC NEWS 15.4%
3. SC LIST (CC DBS) 15.4%
4. SYSTEM NEWS 3.8%
5. SYSTEM3 NEWS 3.8%
6. CC SETTINGS 3.8%
7. SC 3.8%
8. CC GLOSSARY 3.8%
11. All others 0.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)