MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 03/17/01 through 03/23/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 130 877 1,007
Davis 356 31 387
Irvine 249 0 249
Los Angeles 29 243 272
Riverside 35 76 111
San Diego 65 236 301
San Francisco 184 0 184
Santa Barbara 2 117 119
Santa Cruz 11 80 91
LBL 0 129 129
LLL 0 61 61
Los Alamos n/a 0 0
Other - UC 1 55 56
U.S. Forestry 0
Other-Network UC n/a 635 635
_______ ______ _____
1,062 2,540 3,602
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 69 260 2,729
2-4 a.m. 51 177 1,406
4-6 a.m. 47 223 1,423
6-8 a.m. 119 655 8,274
8-10 a.m. 431 1,268 10,655
10-12 a.m. 677 1,612 16,419
12-2 p.m. 583 1,554 17,684
2-4 p.m. 689 1,705 16,206
4-6 p.m. 465 1,337 11,191
6-8 p.m. 222 696 6,476
8-10 p.m. 145 476 4,566
10-12 p.m. 104 301 3,400
__________ __________ __________ _________________
Total: 3,602 10,264 100,429
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 325 2,351 2,676
Davis 1,114 110 1,224
Irvine 803 0 803
Los Angeles 59 586 645
Riverside 61 195 256
San Diego 166 704 870
San Francisco 509 0 509
Santa Barbara 6 378 384
Santa Cruz 17 225 242
LBL 0 432 432
LLL 0 690 690
Los Alamos n/a 0 0
Other - UC 2 137 139
U.S. Forestry 0
Other-Network UC n/a 1,394 1,394
_______ ______ _____
3,062 7,202 10,264
Number of FIND commands by database
CC database 10,040
CCT database 224
Total number of FIND commands 10,264
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,848 22,974 25,822
Davis 10,880 1,138 12,018
Irvine 5,880 0 5,880
Los Angeles 492 7,331 7,823
Riverside 624 1,930 2,554
San Diego 1,295 6,985 8,280
San Francisco 6,147 0 6,147
Santa Barbara 86 5,695 5,781
Santa Cruz 224 1,479 1,703
LBL 0 4,436 4,436
LLL 0 8,676 8,676
Los Alamos n/a 0 0
Other - UC 8 1,248 1,256
U.S. Forestry 0
Other-Network UC n/a 10,053 10,053
_______ ______ _____
28,484 71,945 100,429
Number of Records Displayed by database:
CC database 92,868
CCT database 7,561
Total number of Records Displayed 100,429
1.4 Relative Use of Databases
______________________________
Relative use of CC vs. CCT databases:
Percent of CC sessions 95.3%
Percent of CCT sessions 4.7%
Percent of searches done in the CC database 97.8%
Percent of searches done in the CCT database 2.2%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.9
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
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 583:24
Average number of searches completed per session 2.9
Retrievals per search - median 9.0
Retrievals per search - average 559.5
Retrievals per search - standard deviation 6825.5
Percent of searches completed with 0 results 24.5%
Percent of searches entered that are long 0.2%
Percent of long searches completed
(includes partial results) 61.9%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 9,294 37.3%
DISPLAY (excluding automatic displays) 7,284 29.2%
HELP 225 0.9%
EXPLAIN 219 0.9%
SET/RESET 1,472 5.9%
SHOW 37 0.1%
ADD ON (AND, OR, AND NOT) 746 3.0%
LOGON or LOGOFF 4,205 16.9%
COMMENT 0 0.0%
SAVE 359 1.4%
USE 17 0.1%
OTHER 1,084 4.3%
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 4,406 41.5% 699 15.9% 33 194.6 826.9
TITLE WORD 3,315 31.2% 968 29.2% 15 1122.5 8203.2
EXACT TITLE 129 1.2% 66 51.2% 4 68.0 238.5
JOURNAL 410 3.9% 179 43.7% 87 5353.8 33511.0
EXACT JOURNAL 503 4.7% 303 60.2% 36 2499.6 9523.5
SUBJECT CAT 36 0.3% 5 13.9% 18 228.9 740.1
SUBFILE 47 0.4% 7 14.9% 83 662.8 1598.2
PUBLICATION TYPE 33 0.3% 8 24.2% 35 164.8 302.0
LANGUAGE 2 0.0% 0 0.0% 446 446.0 503.5
DATE 171 1.6% 35 20.5% 7 92.7 337.4
ADDED 613 5.8% 385 62.8% 20 34.3 40.9
PERIODICAL 371 3.5% 58 15.6% 4 38.3 134.6
EXACT PE 106 1.0% 11 10.4% 3 23.7 127.5
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 479 4.5% 134 28.0% 23 1224.4 7767.2
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 1,339 14.5% 623 46.5% 10 92.7 477.9
Single 7,921 85.5% 1,603 20.2% 29 864.2 8571.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.1%
SHORT 78.3%
LONG 4.8%
FIELDS 2.4%
PERIODICALS 8.7%
COMMENTS 0.0%
Other 1.7%
2.1 CCT Database Statistics
____________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 61:28
Average number of searches completed per session 1.3
Retrievals per search - median 31.0
Retrievals per search - average 187.4
Retrievals per search - standard deviation 583.1
Percent of searches completed with 0 results 34.4%
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 224 23.1%
DISPLAY (excluding automatic displays) 330 34.1%
HELP 58 6.0%
EXPLAIN 39 4.0%
SET/RESET 117 12.1%
SHOW 12 1.2%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 150 15.5%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 39 4.0%
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 172 76.8% 66 38.4% 97 297.6 685.6
EXACT JOURNAL 37 16.5% 9 24.3% 117 196.7 254.9
SUBJECT CAT 1 0.4% 0 0.0% 4,698 4698.0 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 14 6.3% 2 14.3% 4 19.4 45.3
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 224 100% 77 34.4% 91 285.6 700.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.8%
ISSUES 48.8%
SHORT 25.2%
LONG 13.7%
PERIODICALS 5.8%
COMMENTS 0.0%
Other 0.8%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 8.4%
Ten most frequent errors:
1. NS command - no next screen 31.6%
2. First word of command is invalid 28.3%
3. FIND command with invalid index name 10.4%
4. Index invalid in current database 4.5%
5. DISPLAY command - no FIND results 2.4%
6. DISPLAY command contains invalid word 2.4%
7. Search term missing from search command 2.2%
8. PS command - no previous screen 2.2%
9. Valid command at an inappropriate time 1.9%
10. D ABS command in database w/o abstracts 1.4%
11. All others 12.7%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 22.9%
2. LOCATE (ARTICLE DBS) 10.9%
3. FIND (CC DB) 9.7%
4. CC INDEXES 8.9%
5. Unrecognized term 4.7%
6. COMMANDS 3.9%
7. CURRENT DATES 3.5%
8. DISPLAY 3.1%
9. FIND (CCT DB) 3.1%
10. CCT DATABASE 3.1%
11. All others 26.4%
Ten most frequent HELP situations:
1. Help requested from START CC command 16.3%
2. First word of command is invalid 12.6%
3. F/BR with index invalid in current DB 8.7%
4. FIND command with invalid index name 8.1%
5. Help requested from SET DB command 6.8%
6. DISPLAY command-first of >1 screen 6.1%
7. FIND command with zero results 5.0%
8. DISPLAY command - middle of >1 screen 4.3%
9. DISPLAY command-complete in one screen 4.1%
10. FIND command retrieves >1 book 3.1%
11. All others 25.0%
Ten most frequent SHOW requests:
1. HISTORY 59.2%
2. SYSTEM NEWS 14.3%
3. SC LIST (CC DBS) 8.2%
4. SEARCH 6.1%
5. LIBRARY NEWS 4.1%
6. CCT SETTINGS 4.1%
7. CC GLOSSARY 2.0%
8. CC STATISTICS 2.0%
11. All others 0.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)