MELVYL IAC DATABASES TELNET STATISTICS
Time period: 05/26/01 through 06/01/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 43 145 188
Davis 213 1 214
Irvine 125 0 125
Los Angeles 0 91 91
Riverside 28 15 43
San Diego 20 44 64
San Francisco 33 0 33
Santa Barbara 22 27 49
Santa Cruz 63 34 97
LBL 0 0 0
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 0 29 29
Stanford 19
Other-Network UC n/a 141 141
_______ ______ _____
547 527 1,093
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 24 78 619
2-4 a.m. 16 31 254
4-6 a.m. 4 17 24
6-8 a.m. 13 37 537
8-10 a.m. 81 218 2,481
10-12 a.m. 176 406 4,831
12-2 p.m. 199 630 6,072
2-4 p.m. 219 561 6,086
4-6 p.m. 159 464 6,376
6-8 p.m. 90 249 3,781
8-10 p.m. 65 313 3,204
10-12 p.m. 47 165 1,020
__________ __________ __________ _________________
Total: 1,093 3,169 35,285
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 131 412 543
Davis 493 2 495
Irvine 431 0 431
Los Angeles 0 239 239
Riverside 48 36 84
San Diego 42 127 169
San Francisco 89 0 89
Santa Barbara 56 55 111
Santa Cruz 228 76 304
LBL 0 0 0
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 1 74 75
Stanford 32
Other-Network UC n/a 597 597
_______ ______ _____
1,519 1,618 3,169
Number of FIND commands by database
MAGS database 2,895
NEWS database 191
COMP database 83
Total number of FIND commands 3,169
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,662 5,715 7,377
Davis 4,433 0 4,433
Irvine 2,932 0 2,932
Los Angeles 0 4,685 4,685
Riverside 542 254 796
San Diego 340 824 1,164
San Francisco 821 0 821
Santa Barbara 758 712 1,470
Santa Cruz 1,841 744 2,585
LBL 0 0 0
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 0 877 877
Stanford 48
Other-Network UC n/a 7,839 7,839
_______ ______ _____
13,329 21,650 35,027
Number of Records Displayed by database:
MAGS database 33,472
NEWS database 1,251
COMP database 562
Total number of Records Displayed 35,027
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 89.3%
Percent of NEWS sessions 8.0%
Percent of COMP sessions 2.7%
Percent of searches done in the MAGS database 91.4%
Percent of searches done in the NEWS database 6.0%
Percent of searches done in the COMP database 2.6%
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 2.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.0
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 7:04
Average session length (minutes:seconds) 13:19
Longest session recorded (minutes:seconds) 513:59
Average number of searches completed per session 2.9
Retrievals per search - median 6.0
Retrievals per search - average 454.3
Retrievals per search - standard deviation 2745.4
Percent of searches completed with 0 results 28.0%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 44.2%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,674 28.6%
DISPLAY (excluding automatic displays) 3,522 37.7%
HELP 288 3.1%
EXPLAIN 211 2.3%
SET/RESET 373 4.0%
SHOW 53 0.6%
ADD ON (AND, OR, AND NOT) 221 2.4%
LOGON or LOGOFF 1,294 13.9%
COMMENT 0 0.0%
SAVE 133 1.4%
USE 5 0.1%
OTHER 561 6.0%
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:
PERSONAL AUTHOR 563 20.4% 131 23.3% 10 58.0 237.7
TITLE WORD 498 18.0% 152 30.5% 13 669.7 3205.1
EXACT TITLE 49 1.8% 28 57.1% 2 27.7 104.0
JOURNAL 159 5.7% 79 49.7% 1,324 4386.5 7771.5
EXACT JOURNAL 75 2.7% 29 38.7% 676 5654.2 10690.8
SUBJECT 506 18.3% 193 38.1% 25 277.2 1140.1
EXACT SUBJECT 27 1.0% 11 40.7% 43 170.9 372.9
KEYWORD 740 26.8% 142 19.2% 24 446.8 2615.9
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 6 0.2% 0 0.0% 4 14.5 24.7
DATE 52 1.9% 22 42.3% 5 58.4 128.1
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 62 2.2% 12 19.4% 10 80.0 245.1
EXACT PE 4 0.1% 0 0.0% 7 20.8 32.4
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 25 0.9% 1 4.0% 872 1680.4 2994.3
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 122 4.6% 33 27.0% 12 471.6 1697.9
Single 2,520 95.4% 733 29.1% 20 664.4 3365.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
SHORT 61.7%
LONG 1.3%
FIELDS 1.0%
PERIODICALS 1.3%
COMMENTS 0.0%
Other 32.4%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:00
Average session length (minutes:seconds) 6:42
Longest session recorded (minutes:seconds) 18:09
Average number of searches completed per session 2.8
Retrievals per search - median 1.0
Retrievals per search - average 1168.0
Retrievals per search - standard deviation 9895.8
Percent of searches completed with 0 results 38.6%
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 78 32.4%
DISPLAY (excluding automatic displays) 88 36.5%
HELP 6 2.5%
EXPLAIN 3 1.2%
SET/RESET 15 6.2%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 5 2.1%
LOGON or LOGOFF 32 13.3%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 14 5.8%
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 7 8.6% 4 57.1% 3 21.0 32.9
TITLE WORD 30 37.0% 12 40.0% 7 39.6 100.8
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 17 21.0% 12 70.6% 6 34.8 50.7
EXACT SUBJECT 1 1.2% 1 100% 0 0.0 0.0
KEYWORD 21 25.9% 4 19.0% 65 5632.9 21799.7
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 2.5% 0 0.0% 2 2.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 2 2.5% 0 0.0% 63 62.5 87.0
EXACT PE 1 1.2% 0 0.0% 1 1.0 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 3 3.8% 1 33.3% 2 2.0 0.0
Single 75 96.2% 31 41.3% 10 2200.7 13580.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 9.7%
SHORT 54.2%
LONG 2.6%
FIELDS 0.6%
PERIODICALS 1.9%
COMMENTS 0.0%
Other 31.0%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 756
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 62
displays or when any of these paging options is set.
TEXT included with MAIL commands 195
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:35
Average session length (minutes:seconds) 10:38
Longest session recorded (minutes:seconds) 136:42
Average number of searches completed per session 2.1
Retrievals per search - median 2.0
Retrievals per search - average 416.8
Retrievals per search - standard deviation 3531.4
Percent of searches completed with 0 results 41.4%
Percent of searches entered that are long 0.5%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 185 34.6%
DISPLAY (excluding automatic displays) 123 23.0%
HELP 23 4.3%
EXPLAIN 13 2.4%
SET/RESET 40 7.5%
SHOW 1 0.2%
ADD ON (AND, OR, AND NOT) 6 1.1%
LOGON or LOGOFF 111 20.8%
COMMENT 0 0.0%
SAVE 4 0.7%
USE 0 0.0%
OTHER 28 5.2%
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 12 6.3% 8 66.7% 17 37.5 53.8
TITLE WORD 63 33.3% 17 27.0% 18 479.2 2434.8
EXACT TITLE 6 3.2% 6 100% 0 0.0 0.0
JOURNAL 1 0.5% 0 0.0% 15 15.0 0.0
EXACT JOURNAL 1 0.5% 0 0.0% 10 10.0 0.0
SUBJECT 43 22.8% 23 53.5% 33 70.0 132.3
EXACT SUBJECT 2 1.1% 2 100% 0 0.0 0.0
KEYWORD 54 28.6% 20 37.0% 23 1576.4 7740.1
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 7 3.7% 1 14.3% 13 59.0 123.6
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
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 8 4.4% 1 12.5% 12 52.0 114.3
Single 172 95.6% 75 43.6% 23 792.1 4871.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.8%
SHORT 47.1%
LONG 2.3%
FIELDS 1.5%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 43.2%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.3%
Ten most frequent errors:
1. First word of command is invalid 34.5%
2. NS command - no next screen 25.3%
3. FIND command with invalid index name 13.0%
4. DISPLAY command contains invalid word 3.8%
5. PS command - no previous screen 3.7%
6. Search term missing from search command 2.5%
7. Valid command at an inappropriate time 2.1%
8. MAIL command issued w/o email address 1.5%
9. DISPLAY command-record numbers too large 1.2%
10. Index invalid in current database 0.9%
11. All others 11.5%
Ten most frequent EXPLAIN requests:
1. GUIDE 29.5%
2. LOCATE (ARTICLE DBS) 22.9%
3. MAGS DATABASE 8.8%
4. FIND 5.7%
5. COMMANDS 5.3%
6. DATABASES 4.0%
7. INDEXES 3.5%
8. Unrecognized term 3.5%
9. DISPLAYS (IAC DBS) 2.6%
10. ADDON SEARCH 2.6%
11. All others 11.5%
Ten most frequent HELP situations:
1. Help requested from SET DB command 24.4%
2. First word of command is invalid 23.7%
3. FIND command with invalid index name 10.8%
4. FIND command with zero results 6.1%
5. DISPLAY command-complete in one screen 5.0%
6. FIND command retrieves >1 book 4.0%
7. DISPLAY command - middle of >1 screen 3.5%
8. PS command - no previous screen 2.8%
9. DISPLAY command-first of >1 screen 2.6%
10. FIND command retrieves 1 book 2.2%
11. All others 14.9%
Ten most frequent SHOW requests:
1. HISTORY 46.3%
2. MAIL STATUS 27.8%
3. SEARCH 20.4%
4. SETTINGS (IAC DBS) 3.7%
5. GLOSSARY 1.9%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)