MELVYL IAC DATABASES TELNET STATISTICS
Time period: 09/22/01 through 09/28/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 111 299 410
Davis 99 0 99
Irvine 87 0 87
Los Angeles 3 54 57
Riverside 11 11 22
San Diego 12 12 24
San Francisco 28 0 28
Santa Barbara 4 30 34
Santa Cruz 14 20 34
LBL 0 9 9
LLL 0 5 5
Los Alamos n/a 4 4
Other - UC 1 32 33
Stanford 6
Other-Network UC n/a 87 87
_______ ______ _____
370 563 939
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 10 20 470
2-4 a.m. 1 2 27
4-6 a.m. 3 8 250
6-8 a.m. 18 49 296
8-10 a.m. 108 314 4,201
10-12 a.m. 151 457 4,943
12-2 p.m. 159 374 4,021
2-4 p.m. 243 565 5,369
4-6 p.m. 126 323 4,170
6-8 p.m. 51 141 1,378
8-10 p.m. 36 135 1,649
10-12 p.m. 33 160 2,248
__________ __________ __________ _________________
Total: 939 2,548 29,022
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 243 661 904
Davis 288 0 288
Irvine 247 0 247
Los Angeles 9 134 143
Riverside 55 47 102
San Diego 16 36 52
San Francisco 74 0 74
Santa Barbara 70 92 162
Santa Cruz 33 34 67
LBL 0 21 21
LLL 0 30 30
Los Alamos n/a 11 11
Other - UC 1 98 99
Stanford 9
Other-Network UC n/a 339 339
_______ ______ _____
1,036 1,503 2,548
Number of FIND commands by database
MAGS database 2,251
NEWS database 216
COMP database 81
Total number of FIND commands 2,548
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 4,071 9,504 13,575
Davis 2,306 0 2,306
Irvine 1,508 0 1,508
Los Angeles 31 1,418 1,449
Riverside 166 279 445
San Diego 81 1,592 1,673
San Francisco 798 0 798
Santa Barbara 505 536 1,041
Santa Cruz 213 365 578
LBL 0 264 264
LLL 0 438 438
Los Alamos n/a 299 299
Other - UC 5 967 972
Stanford 5
Other-Network UC n/a 3,665 3,665
_______ ______ _____
9,684 19,327 29,016
Number of Records Displayed by database:
MAGS database 25,108
NEWS database 1,453
COMP database 2,461
Total number of Records Displayed 29,016
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 85.9%
Percent of NEWS sessions 9.8%
Percent of COMP sessions 4.3%
Percent of searches done in the MAGS database 88.3%
Percent of searches done in the NEWS database 8.5%
Percent of searches done in the COMP database 3.2%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.7
Standard deviation in seconds 2.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.8
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:15
Average session length (minutes:seconds) 13:46
Longest session recorded (minutes:seconds) 432:50
Average number of searches completed per session 2.8
Retrievals per search - median 6.0
Retrievals per search - average 477.8
Retrievals per search - standard deviation 4372.3
Percent of searches completed with 0 results 28.6%
Percent of searches entered that are long 1.2%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,092 27.4%
DISPLAY (excluding automatic displays) 2,964 38.8%
HELP 185 2.4%
EXPLAIN 119 1.6%
SET/RESET 301 3.9%
SHOW 23 0.3%
ADD ON (AND, OR, AND NOT) 159 2.1%
LOGON or LOGOFF 1,047 13.7%
COMMENT 0 0.0%
SAVE 253 3.3%
USE 0 0.0%
OTHER 489 6.4%
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 427 19.6% 110 25.8% 11 50.3 149.4
TITLE WORD 572 26.3% 174 30.4% 11 219.2 1621.5
EXACT TITLE 36 1.7% 15 41.7% 3 7.5 11.8
JOURNAL 72 3.3% 34 47.2% 3,884 11977.0 25827.6
EXACT JOURNAL 58 2.7% 30 51.7% 1,749 7899.3 16245.2
SUBJECT 439 20.2% 121 27.6% 29 212.3 572.5
EXACT SUBJECT 24 1.1% 5 20.8% 140 766.4 1078.7
KEYWORD 424 19.5% 100 23.6% 22 470.1 2703.8
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 5 0.2% 3 60.0% 4 4.0 1.4
DATE 45 2.1% 5 11.1% 16 63.6 133.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 36 1.7% 11 30.6% 12 341.7 1117.5
EXACT PE 27 1.2% 5 18.5% 8 45.2 109.9
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 0.5% 1 10.0% 262 494.7 525.1
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 98 4.7% 32 32.7% 10 84.3 198.3
Single 1,979 95.3% 550 27.8% 19 713.4 5420.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.4%
SHORT 61.5%
LONG 1.5%
FIELDS 2.4%
PERIODICALS 1.5%
COMMENTS 0.0%
Other 30.8%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:16
Average session length (minutes:seconds) 9:31
Longest session recorded (minutes:seconds) 37:57
Average number of searches completed per session 2.0
Retrievals per search - median 11.0
Retrievals per search - average 1313.8
Retrievals per search - standard deviation 4199.4
Percent of searches completed with 0 results 22.2%
Percent of searches entered that are long 2.5%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 71 17.7%
DISPLAY (excluding automatic displays) 206 51.2%
HELP 10 2.5%
EXPLAIN 6 1.5%
SET/RESET 16 4.0%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 10 2.5%
LOGON or LOGOFF 56 13.9%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 27 6.7%
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 8 10.7% 4 50.0% 4 4.3 2.9
TITLE WORD 17 22.7% 4 23.5% 18 2218.2 5598.1
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 3 4.0% 1 33.3% 944 944.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 6 8.0% 2 33.3% 54 51.5 36.2
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 39 52.0% 8 20.5% 129 2405.5 5563.7
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 2 2.7% 0 0.0% 159 158.5 41.7
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 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 4 5.6% 1 25.0% 129 136.7 48.0
Single 67 94.4% 17 25.4% 47 2100.3 5208.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.0%
SHORT 72.2%
LONG 0.0%
FIELDS 7.0%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 20.7%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 608
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 46
displays or when any of these paging options is set.
TEXT included with MAIL commands 159
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:16
Average session length (minutes:seconds) 7:49
Longest session recorded (minutes:seconds) 91:13
Average number of searches completed per session 2.3
Retrievals per search - median 1.0
Retrievals per search - average 4133.2
Retrievals per search - standard deviation 59078
Percent of searches completed with 0 results 34.3%
Percent of searches entered that are long 1.4%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 200 36.6%
DISPLAY (excluding automatic displays) 125 22.9%
HELP 10 1.8%
EXPLAIN 6 1.1%
SET/RESET 52 9.5%
SHOW 7 1.3%
ADD ON (AND, OR, AND NOT) 16 2.9%
LOGON or LOGOFF 94 17.2%
COMMENT 0 0.0%
SAVE 6 1.1%
USE 0 0.0%
OTHER 31 5.7%
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 19 8.6% 6 31.6% 9 27.2 61.2
TITLE WORD 88 39.8% 32 36.4% 7 115.1 322.7
EXACT TITLE 16 7.2% 3 18.8% 1 22.4 72.9
JOURNAL 7 3.2% 4 57.1% 256 287544 497732
EXACT JOURNAL 3 1.4% 2 66.7% 496 496.0 0.0
SUBJECT 29 13.1% 11 37.9% 61 517.3 1620.6
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 25 11.3% 8 32.0% 11 60.3 128.7
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 19 8.6% 1 5.3% 31 103.2 179.4
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 4 1.8% 0 0.0% 25 24.3 19.0
EXACT PE 11 5.0% 1 9.1% 14 26.5 28.6
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 0 0.0% 0 0.0% 0 0.0 0.0
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 23 11.7% 1 4.3% 16 107.6 186.5
Single 174 88.3% 66 37.9% 10 8127.6 82961.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.5%
SHORT 38.0%
LONG 2.7%
FIELDS 0.9%
PERIODICALS 8.1%
COMMENTS 0.0%
Other 45.8%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 10.7%
Ten most frequent errors:
1. First word of command is invalid 33.0%
2. NS command - no next screen 25.3%
3. FIND command with invalid index name 14.9%
4. PS command - no previous screen 3.7%
5. DISPLAY command contains invalid word 3.5%
6. Valid command at an inappropriate time 3.0%
7. Search term missing from search command 2.0%
8. MAIL command issued w/o email address 1.7%
9. DISPLAY command - no FIND results 1.1%
10. NS of SHOW/EXP command-no next screen 1.0%
11. All others 10.9%
Ten most frequent EXPLAIN requests:
1. GUIDE 19.8%
2. FIND 16.0%
3. LOCATE (ARTICLE DBS) 11.5%
4. INDEXES 7.6%
5. MAIL 6.9%
6. COMMANDS 6.1%
7. Unrecognized term 6.1%
8. MAGS DATABASE 3.8%
9. DISPLAYS (IAC DBS) 3.8%
10. PRINT 3.8%
11. All others 14.5%
Ten most frequent HELP situations:
1. Help requested from SET DB command 23.8%
2. First word of command is invalid 22.0%
3. FIND command with invalid index name 13.7%
4. FIND command with zero results 8.3%
5. DISPLAY command-complete in one screen 4.8%
6. 361 3.0%
7. DISPLAY command-first of >1 screen 2.7%
8. DISPLAY command - middle of >1 screen 2.1%
9. MAIL command entered w/o email address 2.1%
10. DISPLAY command - no FIND results 1.8%
11. All others 15.8%
Ten most frequent SHOW requests:
1. HISTORY 30.0%
2. SEARCH 16.7%
3. IAC NEWS 13.3%
4. GLOSSARY 10.0%
5. SETTINGS (IAC DBS) 6.7%
6. SYSTEM NEWS 6.7%
7. LIBRARY NEWS 6.7%
8. UCSB INFORMATION 3.3%
9. 0245 3.3%
10. MAIL STATUS 3.3%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)