MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 03/31/01 through 04/06/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 97 688 785
Davis 322 44 366
Irvine 216 0 216
Los Angeles 5 289 294
Riverside 42 59 101
San Diego 47 319 366
San Francisco 183 0 183
Santa Barbara 4 136 140
Santa Cruz 18 107 125
LBL 0 122 122
LLL 0 55 55
Los Alamos n/a 0 0
Other - UC 2 50 52
U.S. Forestry 0
Other-Network UC n/a 472 472
_______ ______ _____
936 2,341 3,277
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 61 184 1,445
2-4 a.m. 39 202 1,267
4-6 a.m. 46 232 1,420
6-8 a.m. 84 526 4,803
8-10 a.m. 359 1,143 9,966
10-12 a.m. 536 1,470 12,500
12-2 p.m. 557 1,350 14,159
2-4 p.m. 648 1,756 15,350
4-6 p.m. 485 1,515 16,363
6-8 p.m. 247 654 8,744
8-10 p.m. 126 456 4,642
10-12 p.m. 89 241 4,688
__________ __________ __________ _________________
Total: 3,277 9,729 95,347
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 231 1,726 1,957
Davis 1,124 93 1,217
Irvine 699 0 699
Los Angeles 10 810 820
Riverside 81 164 245
San Diego 143 958 1,101
San Francisco 500 0 500
Santa Barbara 4 473 477
Santa Cruz 55 285 340
LBL 0 357 357
LLL 0 694 694
Los Alamos n/a 0 0
Other - UC 3 120 123
U.S. Forestry 0
Other-Network UC n/a 1,199 1,199
_______ ______ _____
2,850 6,879 9,729
Number of FIND commands by database
CC database 9,504
CCT database 225
Total number of FIND commands 9,729
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,388 18,670 21,058
Davis 11,127 652 11,779
Irvine 4,542 0 4,542
Los Angeles 114 7,432 7,546
Riverside 892 1,660 2,552
San Diego 983 6,950 7,933
San Francisco 6,332 0 6,332
Santa Barbara 399 7,272 7,671
Santa Cruz 1,126 2,232 3,358
LBL 0 4,276 4,276
LLL 0 6,219 6,219
Los Alamos n/a 0 0
Other - UC 5 1,261 1,266
U.S. Forestry 0
Other-Network UC n/a 10,815 10,815
_______ ______ _____
27,908 67,439 95,347
Number of Records Displayed by database:
CC database 88,890
CCT database 6,457
Total number of Records Displayed 95,347
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 95.1%
Percent of CCT sessions 4.9%
Percent of searches done in the CC database 97.7%
Percent of searches done in the CCT database 2.3%
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 4.3
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.3
2.0 CC Database Statistics
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 463:47
Average number of searches completed per session 3.0
Retrievals per search - median 9.0
Retrievals per search - average 571.1
Retrievals per search - standard deviation 5694.4
Percent of searches completed with 0 results 24.6%
Percent of searches entered that are long 0.3%
Percent of long searches completed
(includes partial results) 71.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 8,938 38.4%
DISPLAY (excluding automatic displays) 6,668 28.6%
HELP 199 0.9%
EXPLAIN 208 0.9%
SET/RESET 1,235 5.3%
SHOW 39 0.2%
ADD ON (AND, OR, AND NOT) 566 2.4%
LOGON or LOGOFF 3,984 17.1%
COMMENT 0 0.0%
SAVE 374 1.6%
USE 12 0.1%
OTHER 1,063 4.6%
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 4,416 42.8% 675 15.3% 30 241.9 1798.0
TITLE WORD 2,916 28.3% 868 29.8% 14 716.1 5164.5
EXACT TITLE 120 1.2% 44 36.7% 4 33.3 71.6
JOURNAL 517 5.0% 215 41.6% 242 3371.9 12335.8
EXACT JOURNAL 584 5.7% 356 61.0% 48 2156.1 6818.9
SUBJECT CAT 52 0.5% 11 21.2% 11 28.2 37.8
SUBFILE 30 0.3% 3 10.0% 13 309.9 1127.6
PUBLICATION TYPE 27 0.3% 7 25.9% 69 25736.7 70693.2
LANGUAGE 8 0.1% 0 0.0% 15,592 11910.3 9427.1
DATE 125 1.2% 25 20.0% 8 74.5 182.3
ADDED 610 5.9% 425 69.7% 20 27.8 29.5
PERIODICAL 365 3.5% 66 18.1% 5 41.1 133.2
EXACT PE 68 0.7% 6 8.8% 3 9.4 18.4
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 472 4.6% 129 27.3% 27 2206.6 7462.7
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 1,384 15.5% 667 48.2% 8 210.7 1676.7
Single 7,524 84.5% 1,487 19.8% 29 825.5 6452.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.2%
SHORT 78.6%
LONG 5.1%
FIELDS 2.6%
PERIODICALS 7.6%
COMMENTS 0.0%
Other 1.8%
2.1 CCT Database Statistics
____________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 38:43
Average number of searches completed per session 1.4
Retrievals per search - median 65.0
Retrievals per search - average 307.5
Retrievals per search - standard deviation 1196.9
Percent of searches completed with 0 results 20.4%
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 22.2%
DISPLAY (excluding automatic displays) 406 40.3%
HELP 53 5.3%
EXPLAIN 23 2.3%
SET/RESET 96 9.5%
SHOW 14 1.4%
ADD ON (AND, OR, AND NOT) 1 0.1%
LOGON or LOGOFF 155 15.4%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 35 3.5%
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 155 69.2% 40 25.8% 76 402.6 1442.8
EXACT JOURNAL 56 25.0% 6 10.7% 152 278.9 436.2
SUBJECT CAT 0 0.0% 0 0.0% 0 0.0 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 13 5.8% 0 0.0% 16 685.3 2361.3
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 224 100% 46 20.5% 82 388.5 1334.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 13.9%
ISSUES 33.3%
SHORT 29.9%
LONG 15.8%
PERIODICALS 6.4%
COMMENTS 0.0%
Other 0.7%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 7.6%
Ten most frequent errors:
1. NS command - no next screen 33.6%
2. First word of command is invalid 26.7%
3. FIND command with invalid index name 9.4%
4. Index invalid in current database 4.2%
5. DISPLAY command - no FIND results 2.7%
6. DISPLAY command contains invalid word 2.5%
7. PS command - no previous screen 2.1%
8. Search term missing from search command 2.1%
9. D ABS command in database w/o abstracts 2.1%
10. Valid command at an inappropriate time 1.9%
11. All others 12.7%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 15.2%
2. CC INDEXES 14.3%
3. FIND (CC DB) 10.8%
4. LOCATE (ARTICLE DBS) 7.4%
5. COMMANDS 6.9%
6. CC DATABASE 5.2%
7. Unrecognized term 3.9%
8. DATABASES 3.0%
9. SUBJECT CATEGORY 2.6%
10. DISPLAY 2.2%
11. All others 28.6%
Ten most frequent HELP situations:
1. Help requested from START CC command 17.2%
2. First word of command is invalid 12.0%
3. FIND command with invalid index name 8.7%
4. Help requested from SET DB command 8.7%
5. F/BR with index invalid in current DB 8.5%
6. FIND command retrieves >1 book 5.8%
7. DISPLAY command - middle of >1 screen 5.4%
8. DISPLAY command-complete in one screen 4.1%
9. FIND command with zero results 3.9%
10. DISPLAY command-first of >1 screen 3.9%
11. All others 21.7%
Ten most frequent SHOW requests:
1. HISTORY 46.2%
2. SYSTEM NEWS 13.5%
3. SEARCH 9.6%
4. SC LIST (CC DBS) 5.8%
5. LIBRARY NEWS 3.8%
6. CC GLOSSARY 3.8%
7. UPDATE 3.8%
8. GLOSSARY 1.9%
9. SYSTEM4 NEWS 1.9%
10. UCI NEWS 1.9%
11. All others 7.7%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)