MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 12/22/01 through 12/28/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 0 115 115
Davis 90 7 97
Irvine 49 0 49
Los Angeles 0 76 76
Riverside 8 16 24
San Diego 17 71 88
San Francisco 104 0 104
Santa Barbara 0 20 20
Santa Cruz 0 13 13
LBL 0 47 47
LLL 0 13 13
Los Alamos n/a 0 0
Other - UC 0 13 13
U.S. Forestry 0
Other-Network UC n/a 175 175
_______ ______ _____
268 566 834
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 21 96 588
2-4 a.m. 12 37 7,542
4-6 a.m. 21 54 757
6-8 a.m. 24 49 693
8-10 a.m. 90 238 1,416
10-12 a.m. 172 430 4,006
12-2 p.m. 140 410 3,263
2-4 p.m. 148 343 3,265
4-6 p.m. 94 209 1,724
6-8 p.m. 40 90 1,149
8-10 p.m. 36 110 1,235
10-12 p.m. 36 62 1,313
__________ __________ __________ _________________
Total: 834 2,128 26,951
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 0 277 277
Davis 337 7 344
Irvine 177 0 177
Los Angeles 0 194 194
Riverside 23 46 69
San Diego 42 162 204
San Francisco 236 0 236
Santa Barbara 0 54 54
Santa Cruz 0 38 38
LBL 0 65 65
LLL 0 37 37
Los Alamos n/a 0 0
Other - UC 0 44 44
U.S. Forestry 0
Other-Network UC n/a 389 389
_______ ______ _____
815 1,313 2,128
Number of FIND commands by database
CC database 2,111
CCT database 17
Total number of FIND commands 2,128
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 0 4,056 4,056
Davis 2,822 43 2,865
Irvine 8,368 0 8,368
Los Angeles 0 1,353 1,353
Riverside 146 303 449
San Diego 484 1,600 2,084
San Francisco 3,278 0 3,278
Santa Barbara 0 555 555
Santa Cruz 0 305 305
LBL 0 565 565
LLL 0 599 599
Los Alamos n/a 0 0
Other - UC 0 311 311
U.S. Forestry 0
Other-Network UC n/a 2,163 2,163
_______ ______ _____
15,098 11,853 26,951
Number of Records Displayed by database:
CC database 24,624
CCT database 2,327
Total number of Records Displayed 26,951
1.4 Relative Use of Databases
______________________________
Relative use of CC vs. CCT databases:
Percent of CC sessions 97.8%
Percent of CCT sessions 2.2%
Percent of searches done in the CC database 99.2%
Percent of searches done in the CCT database 0.8%
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 3.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.8
2.0 CC Database Statistics
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 776:52
Average number of searches completed per session 2.6
Retrievals per search - median 11.0
Retrievals per search - average 455.6
Retrievals per search - standard deviation 6018.1
Percent of searches completed with 0 results 20.7%
Percent of searches entered that are long 0.5%
Percent of long searches completed
(includes partial results) 72.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,927 34.4%
DISPLAY (excluding automatic displays) 1,543 27.6%
HELP 29 0.5%
EXPLAIN 32 0.6%
SET/RESET 320 5.7%
SHOW 9 0.2%
ADD ON (AND, OR, AND NOT) 184 3.3%
LOGON or LOGOFF 1,055 18.9%
COMMENT 0 0.0%
SAVE 225 4.0%
USE 0 0.0%
OTHER 271 4.8%
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:
PERSONAL AUTHOR 1,127 52.3% 161 14.3% 29 164.4 744.1
TITLE WORD 692 32.1% 204 29.5% 12 705.5 3914.9
EXACT TITLE 3 0.1% 2 66.7% 8 8.0 0.0
JOURNAL 73 3.4% 25 34.2% 48 1993.4 5034.3
EXACT JOURNAL 23 1.1% 3 13.0% 1,056 5000.0 12439.0
SUBJECT CAT 8 0.4% 0 0.0% 8 16.5 18.3
SUBFILE 5 0.2% 0 0.0% 188 174.6 55.7
PUBLICATION TYPE 4 0.2% 0 0.0% 1,928 63966.8 125373
LANGUAGE 3 0.1% 0 0.0% 47 1286.7 2184.5
DATE 54 2.5% 6 11.1% 27 301.9 756.4
ADDED 14 0.6% 2 14.3% 4 5.1 3.8
PERIODICAL 34 1.6% 4 11.8% 3 4.3 4.5
EXACT PE 18 0.8% 2 11.1% 2 5.8 12.8
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 96 4.5% 29 30.2% 10 99.8 323.4
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 221 11.5% 56 25.3% 4 144.7 532.4
Single 1,699 88.5% 322 18.9% 28 674.7 7428.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.1%
SHORT 85.5%
LONG 4.4%
FIELDS 1.1%
PERIODICALS 3.3%
COMMENTS 0.0%
Other 1.4%
2.1 CCT Database Statistics
____________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 51:04
Average number of searches completed per session 0.9
Retrievals per search - median 97.0
Retrievals per search - average 183.5
Retrievals per search - standard deviation 193.7
Percent of searches completed with 0 results 11.8%
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 17 19.5%
DISPLAY (excluding automatic displays) 39 44.8%
HELP 0 0.0%
EXPLAIN 0 0.0%
SET/RESET 12 13.8%
SHOW 1 1.1%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 14 16.1%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 4 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:
JOURNAL 11 55.0% 2 18.2% 356 262.1 217.9
EXACT JOURNAL 2 10.0% 0 0.0% 67 67.0 42.4
SUBJECT CAT 3 15.0% 0 0.0% 183 207.3 132.2
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 3 15.0% 0 0.0% 183 207.3 132.2
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 1 5.0% 0 0.0% 5 5.0 0.0
By number of indexes:
Multiple 3 17.6% 0 0.0% 183 207.3 132.2
Single 14 82.4% 2 14.3% 97 208.2 210.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 8.5%
ISSUES 40.4%
SHORT 10.6%
LONG 36.2%
PERIODICALS 4.3%
COMMENTS 0.0%
Other 0.0%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 6.5%
Ten most frequent errors:
1. NS command - no next screen 34.6%
2. First word of command is invalid 25.4%
3. FIND command with invalid index name 11.5%
4. DISPLAY command contains invalid word 2.5%
5. Index invalid in current database 2.5%
6. D ABS command in database w/o abstracts 2.3%
7. DISPLAY command - no FIND results 2.0%
8. Search term missing from search command 2.0%
9. Valid command at an inappropriate time 1.5%
10. 761 1.5%
11. All others 14.0%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 28.1%
2. FIND (CC DB) 15.6%
3. COMMANDS 9.4%
4. ADD-ON SEARCH 6.3%
5. CC DATABASE 6.3%
6. LOCATE (ARTICLE DBS) 3.1%
7. UPDATE SEARCH 3.1%
8. Unrecognized term 3.1%
9. 1520 3.1%
10. CC SUBFILES 3.1%
11. All others 18.8%
Ten most frequent HELP situations:
1. Help requested from START CC command 24.6%
2. First word of command is invalid 16.4%
3. FIND command with zero results 8.2%
4. Multi-index search with zero results 8.2%
5. Help requested from FIND PA command 6.6%
6. FIND command retrieves >1 book 4.9%
7. Help requested from SET DB command 4.9%
8. FIND command with invalid index name 3.3%
9. DISPLAY command - last of >1 screen 3.3%
10. F/BR with index invalid in current DB 3.3%
11. All others 16.4%
Ten most frequent SHOW requests:
1. HISTORY 50.0%
2. SC LIST (CC DBS) 20.0%
3. UPDATE 20.0%
4. MAIL SETTINGS 10.0%
11. All others 0.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)